9β,11β-Epoxy-5β-corticoids

ABSTRACT

17α-Acyloxy-5α-pregnanes (I) and 17α-acyloxy-5α-pregnanes (IV) have an excellent activity split providing high topical anti-inflammatory activity with very low systemic side effects.

BACKGROUND OF THE INVENTION

Numerous patents disclose various 17α-hydroxy corticoids which are useful as topical anti-inflammatory agents. Various substituents and/or derivatives such as 2α-methyl, 9α-fluoro, 6α-methyl, Δ¹,4, 16-alkyl and 6α-fluoro have been reported to enhance pharmacological activity.

In general, those substituents which enhance corticoid activity such as 6α-methyl, Δ¹,4 or 9α-fluoro were also found to enhance resistance of the 17α-hydroxy corticoid to metabolic transformation by the liver; that is the more potent substituted steroids were more slowly metabolized.

In general, 21-halo steroids have been reported as providing enhanced activity and/or favorable ratio of topical anti-inflammatory activity to systemic side effects, see U.S. Pat. Nos. 2,721,687 and 3,992,422. U.S. Pat. No. 4,051,055 discloses 21-halo steroids but not as topical anti-inflammatory agents but as intermediates in the synthesis of corticoids. U.S. Pat. No. 3,502,700 discloses various 21-halo steroids as useful for their progestational activity and does not mention topical anti-inflammatory activity. All of the above 21-halo steroids were Δ⁴ - and Δ¹,4 -9,21-dihalo-11β-hydroxy-16-alkyl steroids. A number of these are mentioned as having an " . . . especially favourable topical anti-inflammatory activity and/or ratio of topical anti-inflammatory activity to glucocorticoid activity . . . ". In the specification of U.S. Pat. No. 3,721,687 a number of substituents are identified as being preferred or especially preferred. These include Δ¹,4 ; 9α-chloro-11β-hydroxy-16-methyl-17-propionate; 9α-fluoro-11-hydroxy-16α-methyl-17-esters with at least 3 carbon atoms and 9α-fluoro-11-keto-16-methyl or -16-methylene steroids. A particularly preferred compound appears to be "9α,21-difluoro-16-methylene-17-propionyloxy-1,4-diene-3,11,20-trione."

Virtually all the cortical steroids disclosed for topical anti-inflammatory activity are Δ⁴ or Δ¹,4 steroids. U.S. Pat. No. 3,055,922 discloses a series of 5α-steroids which were alleged to retain the topical anti-inflammatory activity of the corresponding Δ⁴ - or Δ¹,4 -steroids while the systemic activity was for all practical purposes eliminated. The applicants have now established that the "5α" steroids of U.S. Pat. No. 3,055,922 were actually "5β." This matter will be discussed fully in the Detailed Description of the Invention.

Therefore, both U.S. Pat. Nos. 3,721,687 and 3,055,922 disclose a split between the topical anti-inflammatory activity and the systemic activity. However, U.S. Pat. No. 3,721,687 discloses that 17α-acyloxy-Δ¹,4 -steroids have a good activity split while U.S. Pat. No. 3,055,922 discloses that 17α-hydroxy-5α-steriods have a good activity split. The present invention discloses that 17α-acyloxy-5α-steroids and 17α-acyloxy-5β-steroids surprisingly and unexpectedly have an excellent activity split, and high topical anti-inflammatory topical/systemic ratio.

German Offen No. 2,905,674 discloses a process of transforming a 5α-pregnane to the corresponding Δ¹,4 -17α-acylate which is the opposite of the present invention. The steps in the procedure include (1) protection of the 11β-hydroxyl group as a trimethylsilyl (TMS) derivative (Example 1), (2) esterification of the 17α-hydroxyl group to give a 5α-17α-acyl-11β-TMS steroid (Example 2), (3) dehydrogenation (oxidation) of the 5α-A ring to a Δ¹,4 -A ring (Example 3) and (4) removal of the TMS protecting group (Example 4). In this process a 5α-17α-acyl steroid is disclosed but it does not have a free 11β- hydroxyl group. In addition, the compound is not disclosed as having any useful pharmacological activity but only as an intermediate.

BRIEF DESCRIPTION OF THE INVENTION

Disclosed are 17α-acyloxy-5β-steroids (I) and 17α-acyloxy-5α-steroids (IV) which have an excellent split between topical anti-inflammatory activity and systemic activity.

Also disclosed are 17α-acyloxy-5β-9,11-epoxy steroids (II) and 17α-acyloxy-5β-Δ⁹(11) -steroids (III) which are useful intermediates in the preparation of the 17α-acyloxy-5β-steroids (I) of the present invention.

Further disclosed are 17α-acyloxy-5α-21-hydroxy steroids (IVE) which are useful intermediates in the preparation of the 17α-acyloxy-5α-steroids (IV) of the present invention.

Disclosed is a process for preparing 17α-acyloxy-5β-steroids (I) which comprises (1) hydrogenating the corresponding Δ⁴ - or Δ¹,4 -steroid (IA) in the presence of a hydrogenating catalyst and (2) separating the 5β-isomer from the 5α-isomer.

Also disclosed are processes for preparing the 17α-acyloxy-5β-9,11-epoxy-steroid (II) and the 17α-acyloxy-5β-Δ⁹(11) -steroid (III) which comprises (1) hydrogenating the corresponding Δ⁴ - or Δ¹,4 -steroids (IIA and IIIA) respectively, in the presence of a hydrogenating catalyst and (2) separating the 5β-isomer from the 5α-isomer.

Further disclosed is a process for the preparation of a 17α,21-dihydroxy-5α-steroid (IVD) which comprises (1) blocking the 17α- and 21-hydroxyl groups of a Δ⁴ -17α,21-dihydroxy steroid (IVA) by reaction with formaldehyde to give a Δ⁴ -17,21-blocked steroid (IVB), (2) reducing the Δ⁴ -double bond by reaction with lithium-ammonia to give the 17,21-blocked-5α-steroid (IVC) and (3) removing the 17,21-blocking group.

DETAILED DESCRIPTION OF THE INVENTION

The 17α-acyloxy-5β-corticoids (I) of the present invention are generally most readily prepared by hydrogenating the corresponding Δ⁴ -or Δ¹,4 -steroids of formula (IA) which are either well-known to those skilled in the art or can be readily prepared by well-known procedures from known compounds.

The Δ⁴ - or Δ¹,4 -steroid (IA) starting material is subjected to hydrogenation as is well-known to those skilled in the art. The Δ⁴ or Δ¹,4 -steroid (IA) is dissolved in a suitable organic solvent such as ethyl acetate, acetone, THF, toluene and alcohols such as methanol or ethanol. Preferred solvents are ethyl acetate, THF and acetone. The reaction is performed in the presence of a hydrogenation catalyst. These catalysts are well known to those skilled in the art and include, for example, heterogenous catalysts such as palladium on carbon, platinum on carbon, platinum dioxide, palladium on barium carbonate or palladium on calcium carbonate, rhodium on alumina, rhodium on carbon, palladium on barium sulfate or palladium on zinc oxide and the like. Soluble catalysts such as tris(triphenylphosphine) rhodium (I) chloride may also be employed. In addition strong acid or strong base catalysts may optionally be used. Suitable strong acids include mineral acids such as hydrogen chloride or perchloric acid and organic acids such as p-toluene sulfonic acid or 2,4-dinitrobenzene sulfonic acid. Suitable strong bases include inorganic bases such as sodium hydroxide or potassium hydroxide and organic bases such as triethylamine or 1,4-diazabicyclo[2.2.2]octane (Dabco). The reaction is performed under hydrogen using a pressure of 1-10 atmospheres. One to two atmospheres is convenient. Higher pressure can be utilized if desired.

The reaction is performed at 20°-25° until the desired uptake of hydrogen is complete. Lower or higher temperatures are suitable but room temperature is most convenient.

When the uptake of hydrogen is complete, the mixture is filtered and the filtrate is concentrated under reduced pressure. The concentrate contains a mixture of the 5α and 5β isomers. The 5β isomer is formed stereospecifically when R₉ is fluorine. The 5β isomer predominates when the C ring functionality is 9,11-epoxy (IIA) or Δ⁹(11) (IIIA). A roughly equal mixture of 5β and 5α isomers is formed when R₉ is hydrogen and R₁₁ is hydroxyl. This ratio is dependent on the experimental conditions and the specific structure of the hydrogenation substrate.

The mixture of 5β and 5α isomers is separated by chromatography as is well-known to those skilled in the art. Adsorbents such as silica gel, Florisil and alumina may be employed. Various organic solvents such as methanol, acetone, ethyl acetate, ether, methylene chloride, hexane, Skellysolve B and chloroform are used for elution either alone or in combination. Those fractions containing the steroid product with the 5β configuration as determined by CMR are combined and concentrated to give the desired 17α-acyloxy-5β-product (I). If desired further purification is achieved by crystallization from a suitable solvent.

When a Δ⁴ - or a Δ¹,4 -steroid (IA-IIIA) is hydrogenated, two isomeric products, 5α and 5β (I-III), can be and are formed. U.S. Pat. No. 3,055,922 reported obtaining only the 5α-isomer analytically pure and in almost quantitative yield upon hydrogenation of Δ⁴ - and Δ¹,4 -steroids with the appropriate noble metal catalyst. U.S. Pat. No. 3,055,922 was filed in 1961. In 1972 J. L. Gough, J. P. Guthrie and J. P. Stothers [J.C.S. Chem. Comm. 979 (1972)] reported a method of determining the stereochemistry of the A/B ring junction by CMR. These authors reported that when the A/B ring junction is cis (5β), the C₁₉ carbon atom is less shielded by about 11-12 ppm. Based on this evidence and their own experimentation the applicants have determined that the predominate isomer produced when a Δ⁴ - or Δ¹,4 -steroid is hydrogenated under the conditions set forth in this invention is 5β and not 5α as reported in U.S. Pat. No. 3,055,922. It is realized that at the time of filing of the patent application for U.S. Pat. No. 3,055,922, CMR spectroscopy was not available.

Further, E. L. Shapiro et al. (J. Chem. Soc., Chem. Comm. 1976, 961) in 1976 reported that hydrogenation of Δ⁴ - and Δ¹,4 -3-keto-9α-fluoro gave exclusively the 5β-isomer.

A preferred way to produce the 5β-steroid (I) is by hydrogenation of the corresponding Δ⁴ - or Δ¹,4 -steroid (IA, where R⁹ is fluorine or chlorine) as disclosed in Chart A. An alternative process is to hydrogenate either the 9,11-epoxy-steroid (IIA) or the Δ⁹(11) -steroid (IIIA) to the corresponding 9,11-epoxy-5β-steroid (II) or the Δ⁹(11) -5β-steroid (III). The 17α-acyloxy-5β-9,11-epoxy steroid (II) may be converted to the desired 17α-acyloxy-5β-steroid (I, R₉ is chlorine and R₁₁ is hydroxyl) under carefully controlled reaction conditions (see Example 129). The 17α-acyloxy-5β-Δ9.sup.(11) -steroid (III) may be readily converted to the desired 17α-acyloxy-5β-steroid (I, R₉ is chlorine and R₁₁ is chlorine) by means well known to those skilled in the art.

It is possible to prepare 5β-starting materials from bile acid intermediates. For example, 11α, 17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 21-acetate [E. P. Oliveto et al., J. Amer. Chem. Soc. 80, 6687 (1958)] may readily be converted to 17α,21-dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 21-acetate, an intermediate for preparation of 17α-acyloxy-5β-Δ9.sup.(11) -steroids (III).

Alternatively one skilled in the art can start with a variety of Δ⁴ - or Δ¹,4 -steroids (IA) and hydrogenate to produce the corresponding 5β- and 5α-steroids and then modify the B, C, or D ring of the steroid to obtain the desired pharmacologically active 17α-acyloxy-5β-steroid (I) or 17α-acyloxy-5α-steroid (IV).

The process of hydrogenation of the Δ⁴ or Δ¹,4 -steroids (IA) has been performed with a large variety of substituents, attached to the B, C and D rings of the steroid. Both Δ⁴ - (Example 74) and Δ¹,4 -steroids (Examples 53, 73 and 80) are suitable starting materials for hydrogenation. For example, 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-propionate was prepared from both the corresponding Δ⁴ -steroid (Example 74) and the corresponding Δ¹,4 -steroid (Example 75). Both 11β-hydroxyl (Examples 53, 73, 74, 76 and 78) and 11-keto (Example 80) steroids have been hydrogenated to give the corresponding 5β-steroid. At C-16, 16β-methyl (Examples 53, 73, 74 and 176), 16α-methyl (Examples 104, 107, 113 and 120)and 16-hydrogen (Examples 78 ,80 and 114) steroids all have been used. At C-9, 9α-chloro (Examples 115-117), 9,11-epoxy (Example 125) and Δ⁹(11) (Examples 38 and 44) all can be used. At C-6 both 6α-methyl (Example 80) and 6α-fluoro (Example 81) have been used. At C-21 various functionalities such as hydroxyl (Example 89), ester (Examples 74, 81, 113), chlorine (Examples 53, 73 and 80), mesylate (Examples 76 and 104) and fluorine (Example 117) all can be used.

A given 5β,17α-acylate (I) can be prepared by processes other than hydrogenation of the corresponding Δ⁴ - or Δ¹,4 - precursor. For example, 21-chloro-9α-fluoro-16β-methyl-11β,17α-dihydroxy-5.beta.-pregnane-3,20-dione 17-propionate (I) was prepared from the corresponding Δ¹,4 -steroid (IA) by hydrogenation, see Example 53. The same compound was also prepared by starting with the corresponding Δ¹,4 -17α-hydroxy-21-benzoate, 9α-fluoro-11β,17α, 21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 21-benzoate and subjecting it to the following reactions: hydrogenation (Preparation 2), hydrolysis of the 21-benzoate (Example 22), formation of the 17-propionate (Example 24), formation of the 21-mesylate (Example 29) and displacement of the 21-mesylate (Example 34) by chloride.

Therefore, hydrogenation of the Δ⁴ - or Δ¹,4 -steroid may take place early in the synthesis with other substitution and/or modification to be performed after hydrogenation or the steroid molecule can be substituted and/or modified so that the last step in the synthesis is the reduction of the unsaturation in the steroid A ring.

Generally, the Δ⁴ or Δ¹,4 -steroids (IA) to be hydrogenated have at the 9α-position a fluorine atom and at the 11β-position a hydroxyl group. However, Δ⁴ and Δ¹,4 -steroids having at the 9 and 11 positions a double bond, Δ⁹(11), can also be hydrogenated to produce the corresponding 5β-pregnane. The Δ⁹(11) -5β-steroids are useful to prepare 9α,11β-dichloro-5β-steroids (I), see Examples 38-43 and 44-52 (9α,11β,21-trichloro-5β-steroids). Likewise, Δ⁴ - and Δ¹,4 -steroids having at the 9 and 11 positions an epoxy group (9,11-epoxy) are useful to prepare 9α-chloro-11β-hydroxy-5β-steroids. The 9,11-epoxy-5β-steroids are not useful to prepare 9α-fluoro-11β-hydroxy-5β-steriods because when the epoxide is reacted with hydrogen fluoride only a few percent of the desired 9α-fluoro-11β -hydroxy-5β-steroid are produced.

The 9α-chloro-11β-hydroxy-5β-steroids (I) are obtained from the corresponding 9,11-epoxy-5β-steroids by reaction with hydrogen chloride, hydrogen chloride in the presence of a quaternary amine chloride (such as tetrabutylammonium chloride) or dichlorobis (benzonitrile) palladium (II) under carefully controlled conditions.

The 5α-steroids (IV) are produced in small amounts during hydrogenation of the corresponding Δ⁴ - or Δ¹,4 -steroid (IA). However, a preferred route to prepare the 5α-steroids (IV) is not by hydrogenation of the corresponding Δ⁴ - or Δ¹,4 -steroid (IA) but rather by a stereoselective metal-amine reduction of a Δ⁴ - or Δ¹,4 -steroid. The steroid is reduced with sodium in ammonia or lithium in ammonia or alkyl amines such as methylamine, ethylamine or ethylenediamine, preferably with lithium in liquid ammonia. Before performing the lithium-ammonia reduction the pregnane side chain of the Δ⁴ - or Δ¹,4 -steroid must be protected. The side chain is conveniently protected as a 17,20;20,21-bisdioxy (preferably bismethylenedioxy) derivative as is well-known to those skilled in the art (U.S. Pat. Nos. 2,888,456 and 2,888,457).

The Δ⁴ - or Δ¹,4 -steroid in an inert organic diluent such as THF, diethyl ether or dioxane is added to a solution of lithium in liquid ammonia at -60° to -80°. The reaction is monitored by TLC and when complete (about 1 hour), the reaction is worked up as is well-known to those skilled in the art. Following the stereospecific reduction, the hydroxy protecting groups are removed, as is well-known to those skilled in the art, by acid hydrolysis. Acetic acid is a suitable acid. Alternatively, the 5α-starting materials may be obtained from a sapogenin which possesses the desired 5α-configuration. For example, 3β-hydroxy-5α-pregna-9(11),16-dien-20-one 3-acetate derived from hecogenin is a versatile starting material for preparation of 5α-steroids (IV) of this invention as will be apparent to one skilled in the art. This intermediate has been converted to 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 21-acetate by J. Attenburrow et al (J. Chem. Soc. 1961, 4547).

Following reduction of the Δ⁴ or Δ-¹,4 double bond to produce the 5α-steroid and the hydrolysis of the blocking groups to produce the 17α,21-dihydroxy-Δ⁹(11) -5α-steroid (Preparation 18) the steroid is acylated at C-17. From this point, a large number of modifications at C-9, 11, and 21 can be made to produce the desired 5α-steroid (IV). For example, if a 21-chloro-5α-steroid (IV) is desired, the 21-hydroxyl group is transformed to the mesylate (see Example 205) and subsequently to the 21-chloro substituent (see Example 206, Step 3, and Example 251, Step 1). If a 5α-steroid (IV) unsubstituted at C-21 is desired, it is produced from a 21-chloro steroid (see Example 221). If 9α,11β-dichloro-5α-steroids (IV) are desired, they are produced from the corresponding Δ⁹(11) -5α-steroids as is well known to those skilled in the art (see Examples 251, Step 2 and 374). Many topically active anti-inflammatory steroids have a fluorine atom at C-9. If a 5α-steroid with a hydrogen atom at C-9 is desired, it can be readily prepared from the corresponding 9α-bromo-5α-steroid (see Examples 266 and 383). The 21-phosphates (Examples 314-328), 21-disodium phosphate (Examples 329-343), 21-hemisuccinates (Examples 344-358) and 21-sodium hemisuccinates (Examples 359-373) are produced by means well known to those skilled in the art.

The 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) of the present invention are therapeutically useful anti-inflammatory agents when applied topically or administered locally to warm-blooded animals responsive to treatment with anti-inflammatory corticosteroids. The 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) are especially useful for topical and local administration because they possess the unique combination when applied locally of high potency, low systemic activity, thus producing less unwanted systemic corticoid action for a given amount of topical-local anti-inflammatory active relative to corticoids now employed therapeutically.

The 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) are administered topically to the inflamed skin, eyes, external ears and mucous membranes of the mouth, nose, respiratory tract, vagina, rectum and colon. They are applied or instilled to these areas as drug suspensions or solutions in the usual dosage forms such as solutions, lotions, creams, ointments, gels, pastes, aerosols, bandages or tape, drops, enemas, suppositories, etc. For the therapy of asthma, allergic rhinitis and other inflammatory respiratory disorders, the usual dosage forms such as aerosols or powders, solutions and suspensions for inhalation are employed.

The 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (VI) are also useful for local intralesional therapy by intracavity (e.g., intra-articular) or soft tissue injection of solution, suspension or solution-suspension dosage forms. Also useful for the therapy of secondarily infected and inflamed conditions, particularly of the skin, eyes, external ear canals, rectum and vagina, are combination dosage forms of the 17α-acyloxy-5β-corticosteroids (I) or 17α-acyloxy-5α-corticosteroids (IV) and antifungal and/or antibacterial agents such as clotrimazole, dichloroxine, miconazole, neomycin, gentamycin, clindamycin, etc.

The water soluble esters (pharmaceutically acceptable salts) of 21-hemisuccinate or 21-phosphate are useful in eye and ear drops, rectal and vaginal formulations, for inhalation and for intracavity injection.

The concentration and dosage regimen of the dosage form used and the frequency of administration will depend upon the particular location and condition treated, the severity of the inflamed lesion, the potency of the particular 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV), the phase and natural course of the inflamation, the age and condition of the patient, and other factors known to practitioners skilled in the management of cutaneous and local inflammatory diseases.

The drum concentration ranges, and the dosage regimens of 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) administered topically (locally) on inflammatory lesions of the skin, nostrils, vagina, rectum, colon and external ears are about 0.005% to about 2.5% with one to four daily applications. Generally preferred concentrations are from 0.01% to 0.2%. These same concentration ranges are used in the eyes, but with one to eight daily applications or instillations, according to phase and disease severity. For the therapy of asthma or other inflammations of the respiratory tract, two to three daily inhalations or sprays, each containing from 0.001 to 2.0 mg. of corticosteroid are used. From 1.0 to 100 mg. doses of the 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) are administered for intralesional inflammations of joints, tissue cavities and soft tissues. The volume and frequency of the injections are dependent primarily on lesion size, severity and response to treatment.

Some examples of inflammatory diseases wherein the 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) are useful topically and locally are (1) dermatoses such as psoriasis, atopic, neuro, contact and allergic dermatitis, lichen planus, alopecia areata and immune diseases (2) pruritus ani, vulva and rectal or colonic inflammation (3) conjunctivitis, superficial punctate keratitis and herpes zoster keratitis of the eyes (4) contact, allergic and selected infective otitis of the external ear canal and (5) allergic-inflammatory nasal and respiratory conditions such as rhinitis and asthma.

Some examples of conditions treated with the 17α-acyloxy-5β-corticosteroids (I) and 17α-acyloxy-5α-corticosteroids (IV) by injection into local lesions are (1) rheumatoid arthritis, bursitis and peritendenitis and (2) alopecia areata, cystic acne, keloids, hypertrophic scarring conditions and localized, treatment-resistant type dermatitic lesions.

DEFINITIONS

The definitions and explanations below are for the terms as used throughout the entire patent application including both the specification and claims.

All temperatures are in degrees Centigrade.

TLC refers to thin-layer chromatography.

THF refers to tetrahydrofuran.

DMF refers to dimethylformamide.

SSB refers to a mixture of isomeric hexanes.

p-TSA refers to p-toluenesulfonic acid.

Saline refers to an aqueous saturated sodium chloride solution.

IR refers to infrared spectroscopy determined on a mineral oil mull of the sample.

CMR refers to 13 C magnetic resonance spectroscopy, in deuterochloroform, chemical shifts of C-19 are reported in ppm (δ) downfield from TMS.

NMR refers to nuclear (Proton) magnetic resonance spectroscopy chemical shifts are reported in ppm (δ) downfield from TMS.

[α]_(D) ²⁵ refers to the angle of rotation of plane polarized light (specific optical rotation) of a 1% solution in dioxane at 25°.

When solvent pairs are used, the ratio of solvents used are volume/volume (v/v).

Pharmaceutically acceptable refers to those properties and/or substances which are acceptable to the patient from a pharmacological-toxicological point of view and to the manufacturing pharmaceutical chemist from a physical-chemical point of view regarding composition, formulation, stability, patient acceptance and bio-availability.

R₂ is a hydrogen, fluorine or chlorine atom or methyl group.

R₆ is a hydrogen, fluorine or chlorine atom or methyl group.

R₇ is a hydrogen, fluorine or chlorine atom.

R₉ is a hydrogen, fluorine or chlorine atom.

R is a hydrogen atom or alkyl group of 1 thru 4 carbon atoms.

R₁₁ is a chlorine or oxygen atom or hydroxyl group; when R₁₁ is a chlorine atom or hydroxyl group the between R₁₁ and C₁₁ is a single bond in the β-configuration and when R₁₁ is an oxygen atom the between R₁₁ and C₁₁ is a double bond.

R₁₆α is a hydrogen, fluorine or chlorine atom or methyl group.

R₁₆β is a hydrogen atom or methyl group with the proviso that one of R₁₆α or R₁₆β is a hydrogen atom.

R₁₇ is alkyl of 1 thru 6 carbon atoms, phenyl, p-methylphenyl, p-carboxyphenyl or p-carboalkoxyphenyl.

R₂₁ is a hydrogen, fluorine, chlorine or bromine atom or a --OR_(21a) or --OSO₂ CH₃ group.

R_(21a) is a hydrogen atom, --COR_(21b) or --PO(OH)₂ and pharmaceutically acceptable salts thereof.

R_(21b) is alkyl of 1 thru 6 carbon atoms, phenyl, p-methylphenyl, or p-carboxyphenyl, p-carboalkoxyphenyl, --CH₂ CH₂ COOH and pharmaceutically acceptable salts thereof.

˜ indicates the attached group can be in either the α or β configuration.

is a single or double bond.

When the term "alkyl of 1 thru 6 carbon atoms" is used it includes the isomers thereof when they exist.

A hydrogenation catalyst is an additive which catalyzes the hydrogenation reaction to give the corresponding 5β-steroid (I-III).

Without further elaboration, it is believed that one skilled in the art can, using the preceding descriptions, practice the present invention to its fullest extent.

PREPARATIONS AND EXAMPLES Preparation 1 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 21-acetate

A mixture of 9α-fluoro-11β,17α,21-trihydroxypregna-1,4-diene-3,20-dione 21-acetate (20 g.) in acetone (200 ml.) is hydrogenated in the presence of palladium on carbon (5%, 1 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The concentrate is column chromatographed on silica gel (200 g.) packed in acetone-methylene chloride (10/90). Elution is performed with the same solvent system. The appropriate fractions are pooled and concentrated to give the product which upon crystallization from acetone-SSB gives 9α-fluoro-11β, -17α,21-trihydroxy-5β-pregnane-3,20-dione 21-acetate, m.p. 215.5° (decomposition); [α]_(D) ²⁵ +72°; CMR 26.66 δ; IR (mull) 3580, 3380, 1745, 1730, 1680, 1260, 1235, 1190, 1105, 1050, 990, and 905 cm⁻¹.

Preparation 2 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5βpregnane-3,20-dione 21-benzoate

Following the general procedure of Preparation 1 and making non-critical variations but starting with 9α-fluoro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene 3,20-dione 21-benzoate (betamethasone 21-benzoate) there is obtained 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 21-benzoate, m.p. 205° (decomposition); CMR 26.66 δ; IR 3600, 3340, 1740, 1720, 1695, 1605, 1585, 1490, 1275, 1255, 1125, 1115, 1160, 1045 and 710 cm⁻¹ and [α]_(D) +109°.

Preparation 3 17α,21-Dihydroxy-16β-methylpregna-1,4,9(11)-triene 3,20-dione

A mixture of 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 21-benzoate (U.S. Pat. No. 3,725,392, 20 g.) in methanol (600 ml.), methylene chloride (400 ml.) and methanolic sodium methoxide (25%, 13 ml.) is stirred at 20°-25° for one hour under an inert atmosphere. The reaction mixture is then acidified with acetic acid (4 ml.), concentrated under reduced pressure to about 320 ml. and diluted with water (320 ml.) in methanol (100 ml.). The mixture is extracted with SSB, and then the aqueous methanol phase is concentrated under reduced pressure and cooled to 5°. The product is collected and dried to give the title compound, m.p. 215.5°-218.5°.

Preparations 4 and 5

Following the general procedure of Preparation 3 and making non-critical variations but starting with the corresponding 16α-methyl or 16-hydrogen (R₁₆ is hydrogen) the following compounds are obtained.

Preparation 4 17α,21-Dihydroxy-16α-methylpregna-1,4,9(11)triene-3,20-dione

Preparation 5 17α,21-Dihydroxypregna-1,4,9(11)-triene-3,20-dione

Preparation 6 17α,21-Dihydroxy-16β-methylpregna-1,4,9(11)treine-3,20-dione 17-propionate

A mixture of 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione (Preparation 3, 10 g.) in THF (220 ml. ) containing triethylorthopropionate (11 ml.) and p-TSA (0.66 g.) is allowed to stand at 30° for 0.5 hours. Then sulfuric acid (2 N, 11 ml.) is added. The mixture is stirred for an additional 0.5 hours, made basic with potassium bicarbonate (1 N, 66 ml.), diluted with water and concentrated under reduced pressure. The precipitate is dissolved in methylene chloride, washed with aqueous potassium bicarbonate, dried and concentrated to give the title compound, TLC, Rf=0.40 (acetonemethylene chloride 10/90).

Preparations 7 and 8

Following the general procedure of Preparation 6 and making non-critical variations but starting with the 17,21-dihydroxy steroids of Preparations 4 and 5, (Column A) the 17-esters of Column B are obtained.

    ______________________________________                                         Preparation                                                                              Column A    Column B                                                 ______________________________________                                         7         4           17α,21-Dihydroxy-16a-                                                    methylpregna-1,4,9(11)-                                                        triene-3,20-dione 17-                                                          propionate                                               8         5           17α,21-Dihydroxy-pregna-                                                 1,4,9(11)-triene-3,20-                                                         dione 17-propionate                                      ______________________________________                                    

Preparation 9 17α,21-Dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17,21-dipropionate

A mixture of 17α,21-Dihydroxy-16β-methylpregna-1,4,9(11)-diene-3,20-dione 17-propionate (Preparation 6, 4.1 g.) in pyridine (4 ml.) and propionic anhydride (8 ml.) is allowed to stand for 3 hours. The reaction mixture is diluted with ice water and acetone (100 ml.), allowed to stand for one hour and then concentrated under reduced pressure. The precipitate is collected, dissolved in SSB-ethyl acetate (4/1) and washed successively with aqueous potassium bisulfate, aqueous potassium bicarbonate and saline. The mixture is dried and concentrated under reduced pressure to a foam which is column chromatographed on silica gel (500 g.), packed in acetone-methylene chloride (5/95). Elution is performed with the same acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated to give the title compound, NMR (CDCl₃) 0.73, 1.16, 1.36, 1.40, 4.57, 5.6, 6.1-6.4 and 7.1-7.35 δ.

Preparations 10 and 11

Following the general procedure of Preparation 9 and making non-critical variations but starting with the 17-esters of Preparations 7 and 8 (Column C), the 17,21-diesters of Column D are obtained.

    ______________________________________                                         Preparation Column C    Column D                                               ______________________________________                                         10          7           17α,21-dihydroxy-16α-                                              methylpregna-                                                                  1,4,9(11)-triene-                                                              3,20-dione 17,21-                                                              dipropionate                                           11          8           17α,21-dihydroxy-                                                        pregna-1,4,9(11)-                                                              triene-3,20-dione                                                              17,21-dipropionate                                     ______________________________________                                    

Preparation 12 17α,21-Dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17-propionate 21-mesylate

A mixture of 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17-propionate (Preparation 6, 8.3 g.) in pyridine (39 ml.) is cooled to 0° and methanesulfonylchloride (9.8 ml.) is added slowly. After stirring for one hour at 0°, the reaction mixture is poured into a mixture of ice water containing concentrated hydrochloric acid (30 ml.). The precipitate is collected, dissolved in methylene chloride and washed successively with aqueous potassium bisulfate, water and aqueous potassium bicarbonate. The mixture is dried and concentrated under reduced pressure to a foam which is column chromatographed on silica gel (1 kg.), packed in acetone-methylene chloride (5/95). Elution is performed in the same acetone-methylene chloride mixture, the appropriate fractions are pooled and concentrated to give the title compound, NMR (CDCl₃) 0.73, 1.16, 1.37, 1.41, 3.20, 4.7, 5.5, 6.0-6.4, and 7.1-7.3 δ.

Preparations 13 and 14

Following the general procedure of Preparation 12 and making non-critical variations but starting with and substituting the 21-hydroxy steroids of Preparations 7 and 8 (Column E), for 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17-propionate, the 21-mesylates of Column F are obtained.

    ______________________________________                                         Preparation                                                                               Column E    Column F                                                ______________________________________                                         13         7           17α,21-Dihydroxy-16α-                                              methylpregna-1,4,9-                                                            (11)-triene-3,20-                                                              dione 17-propionate                                                            21-mesylate                                             14         8           17α,21-dihydro-5β-                                                  pregna-1,4,9(11)-                                                              triene-3,20-dione                                                              17-propionate                                                                  21-mesylate                                             ______________________________________                                    

Preparation 15 17α,21-Dihydroxy-16β-methylpregna-4,9(11)-diene-3,20-dione

A mixture of 17α,21-dihydroxy-16β-methylpregna-4,9(11)-diene-3,20-dione 21-benzoate (U.S. Pat. No. 3,725,392, 32 g.) in methanol (700 ml.) is stirred with potassium carbonate (5.3 g.) in water (50 ml.) at 20°-25° for about 2 hours. The mixture is cooled, acidified with acetic acid (7 ml.), diluted with water (475 ml.) and concentrated under reduced pressure. The precipitate is collected, washed with water and dried to give the title compound, TLC, Rf=0.70 (acetonemethylene chloride, 20/80).

Preparation 16 16β-Methyl-17α,20:20,21-bismethylenedioxypregna-4,9(11)dien-3-one

A solution of hydrochloric acid (250 ml.) and formalin (35%, 250 ml.) prepared at 0° is added to a stirred suspension of 17α,21-dihydroxy-16β-methylpregna-4,9(11)-diene-3,20-dione (Preparation 15, 32 g.) in methylene chloride (900 ml.). The mixture is stirred for 16 hours at 20°-25° and diluted with ice water (500 ml.). The organic layer is separated, washed successively with cold aqueous sodium carbonate and water and then is dried and concentrated under reduced pressure. The residue is column chromatographed on silica gel packed in methylene chloride. Elution is performed with acetone-methylene chloride mixture beginning with 0% acetone and increasing to 7%. The appropriate fractions are pooled and concentrated to give a solid which is crystallized from acetone-SSB to give the title compound, m.p. 232.5°-237°; [α]_(D) -29°; UV λ_(max) =239.5 nm (ε=17,250).

Preparation 17 16β-Methyl-17α,20:20,21-bismethylenedioxy-5α -pregn-9(11)en-3-one

A solution of 16β-methyl-17α,20:20,21-bismethylenedioxypregna-4,9(11)diene-3-one (Preparation 16, 22.8 g.) in THF (290 ml.) is added slowly (3/4 hour) to a solution of lithium wire (2.28 g.) in liquid ammonia (1.1 l.) at -78°. The mixture is stirred for an additional one hour. Then ammonium chloride (17.7 g.) is added. The ammonia is allowed to evaporate on a steam bath and the mixture is concentrated under reduced pressure. The residue is stirred with acetone (600 ml.) and water (300 ml.), the pH is adjusted to 6 with hydrochloric acid and the mixture is further diluted with water (1.1 l.) The solid is collected, washed with water and dried at 60° under reduced pressure to give a solid which is recrystallized from aqueous acetone to give the title compound, m.p. 247°-255°; CMR 17.38 δ; IR (mull) 2770, 1712, 1673, 1691, 1078, 1007 and 946 cm⁻¹.

Preparation 18 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione

A suspension of 16β-methyl-17α,20:20,21-bismethylenedioxy-5α-pregn-9(11)-en-3-one (Preparation 17, 12.5 g.), acetic acid (375 ml.) and water (125 ml.) is heated under reflux for 2 hours. The mixture is then diluted with ice and water to 4 l. and stirred for about 20 minutes. The solid is collected, washed with water and suspended in acetone (750 ml.) and water (375 ml.). The mixture is neutralized with sodium hydroxide (1 N), diluted with ice water to 4 l., then refiltered. The product is collected and dried under reduced pressure to give the title compund TLC. Rf=0.18 (acetone-methylene chloride 10/90).

EXAMPLE 1 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 21 acetate (Preparation 1, 21.6 g.) in methanol (680 ml.) and aqueous potassium carbonate (10%, 75 ml.) is stirred for 0.5 hours under a nitrogen atmosphere. The mixture is then acidified with acetic acid (6 ml.), diluted with water and concentrated under reduced pressure. The mixture is cooled and the solid collected, dried and successively cyrstallized from aqueous acetone and acetone to give 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione, m.p. 220°-228° (decomposition). EXAMPLE 2 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione (Example 1, 11.2 g.) in THF (230 ml.) containing triethylorthopropionate (11.6 ml.) and p-TSA (0.70 g.) is allowed to stand for 0.75 hours, then sulfuric acid (2 N, 11.6 ml.) is added, the mixture is stirred for an additional 0.3 hours, made basic with potassium bicarbonate (1 N, 70 ml.), diluted with water and concentrated under reduced pressure. The precipitate is dissolved in ethyl acetate, washed with saline, dried and concentrated to give 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate, as a foam, TLC, Rf=0.29 (acetone-methylene chloride, 20/80).

EXAMPLES 3-6

Following the general procedure of Example 2, and making non-critical variations but substituting the ortho esters of Column G for triethylorthopropionate, the 17α-acyloxy-5β-steroids of Column H are obtained.

    ______________________________________                                         Example                                                                               Column G     Column H                                                   ______________________________________                                         3      Trimethylortho-                                                                             9α-Fluoro-11β,17α,21-trihydroxy                  acetate      5β-pregnane-3,20-dione 17-                                                acetate                                                    4      Triethylortho-                                                                              9α-Fluoro-11β,17α,21-trihydroxy                  butyrate     5β-pregnane-3,20-dione                                                    17-butyrate                                                5      Trimethylortho-                                                                             9α-Fluoro-11β,17α,21-trihydroxy                  valerate     5β-pregnane-3,20-dione                                                    17-valerate                                                6      Trimethylortho-                                                                             9α-Fluoro-11β,17α,21-trihydroxy                  benzoate     5β-pregnane-3,20-dione                                                    17-benzoate                                                ______________________________________                                    

EXAMPLE 7 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate 21-mesylate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate (Example 2, 11.0 g.) in pyridine (49 ml.) is cooled to 0° and methanesulfonyl chloride (12.2 ml.) is added over a period of 0.2 hours. After stirring for 1 hour at 0° the reaction mixture is poured into a mixture of ice and water containing concentrated hydrochloric acid (37.5 ml.). The precipitate is collected, dissolved in methylene chloride and washed successively with aqueous potassium bisulfate, water and aqueous potassium bicarbonate. The mixture is dried and concentrated under reduced pressure to a foam which is column chromatographed on silica gel (500 g.) packed in acetone-methylene chloride (5/95). Elution is performed with the same acetone-methylene chloride mixture. Appropriate fractions are pooled and concentrated to give 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate 21-mesylate, NMR (CDCl₃) 4.91, 4.68-4.30, 3.18, 1.32, 1.15 and 0.95 δ.

EXAMPLES 8-11

Following the general procedures of Example 7 and making non-critical variations but starting with the 21-hydroxy compounds of Examples 3-6 (Column I) the 21-mesylates of Column J are obtained.

    ______________________________________                                         Ex-                                                                            ample Column I Column J                                                        ______________________________________                                         8     3        9α-Fluoro-11β,17α,21-trihydroxy                               5β-pregnane-                                                              3,20-dione 17-acetate 21-mesylate                               9     4        9α-Fluoro-11β,17α,21-trihydroxy                               5β-pregnane-                                                              3,20-dione 17-butyrate 21-mesylate                              10    5        9α-Fluoro-11β,17α,21-trihydroxy-5β-pr                    egnane-                                                                        3,20-dione 17-valerate 21 mesylate                              11    6        9α-Fluoro-11β,17α,21-trihydroxy-5β-pr                    egnane-                                                                        3,20-dione 17-benzoate 21 mesylate                              ______________________________________                                    

EXAMPLE 12 21-Chloro-9α-fluoro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-propionate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17-propionate 21-mesylate (Example 7, 8.4 g.) and lithium chloride (17.9 g.) in DMF (200 ml.) and acetone (330 ml.) is heated under reflux for 119 hours. The mixture is cooled and the acetone is removed under reduced pressure. The mixture is then diluted with water and extracted with toluene. The organic extract is diluted with ethyl acetate, dried and concentrated under reduced pressure to give a foam which is crystallized from aqueous acetone and recrystallized from acetone-SSB to give the title compound, m.p. 191°-191.5° (decomposition); [α]_(D) ²⁵ +6°; IR (mull) 3420, 1740, 1730, 1695, 1275, 1215, 1205, 1095, 1050, 1035, and 1010 cm⁻¹ ; CMR 27.10 δ.

EXAMPLES 13-16

Following the general procedure of Example 12 and making non-critical variations but starting with the 21-mesylate compounds of Examples 8-11 (Column K) the 21-chloro steroids of Column L are obtained.

    ______________________________________                                         Ex-                                                                            ample Column K  Column L                                                       ______________________________________                                         13    8         21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.b                     eta.-                                                                          pregnane-3,20-dione 17-acetate                                 14    9         21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.b                     eta.-                                                                          pregnane-3,20-dione 17-butyrate                                15    10        21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.b                     eta.-                                                                          pregnane-3,20-dione 17-valerate                                16    11        21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.b                     eta.-                                                                          pregnane-3,20-dione 17-benzoate                                ______________________________________                                    

EXAMPLE 17 21-Chloro-9α-fluoro-17α-hydroxy-5β-pregnane-3,11,20-trione 17-propionate (I)

21-Chloro-9α-fluoro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-propionate (Example 12, 2.48 g.) is oxidized with Jones reagent following the general procedure of Example 64 and making non-critical variations. The reaction product is column chromatographed on silica gel (200 g.) packed in acetone-methylene chloride (5/95). Elution was performed with the same acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated to give a product which upon crystallization from acetone-SSB gives the title compound, m.p. 168.5-169; [α]_(D) ²⁵ -11°; IR (mull) 1730, 1710, 1270, 1190, 1180, 1170, and 1035 cm⁻¹.

EXAMPLES 18-21

Following the general procedure of Example 17 and making non-critical variations but starting with the 11-hydroxy steroid of Examples 13-16 (Column M) the 11-keto compounds of Column N are obtained.

    ______________________________________                                         Example                                                                               Column M   Column N                                                     ______________________________________                                         18     13         21-Chloro-9α-fluoro-17α-hydroxy 5β-                           pregnane-3,11,20-trione 17-acetate                           19     14         21-Chloro-9α-fluoro-17α-hydroxy 5β-                           pregnane-3,11,20-trione 17-butyrate                          20     15         21-Chloro-9α-fluoro-17α-hydroxy 5β-                           pregnane-3,11,20-trione 17-valerate                          21     16         21-Chloro-9α-fluoro-17α-hydroxy 5β-                           pregnane-3,11,20-trione 17-benzoate                          ______________________________________                                    

EXAMPLE 22 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione

9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 21-benzoate (Preparation 2, 4.08 g.) in methanol (110 ml.) and aqueous potassium carbonate (10%, 12 ml.) is stirred for 1 hour under a nitrogen atmosphere. The mixture is then acidified with acetic acid (1 ml.), diluted with water (120 ml.) and extracted three times with SSB. The aqueous methanol phase is concentrated under reduced pressure. The mixture is cooled and the solid collected, dried and crystallized from acetone to give the title compound, m.p. 199°-205°; [α]_(D) +78°; IR 3520, 3460, 3420, 1705, 1080, 1060 and 1050 cm⁻¹.

EXAMPLE 23 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-acetate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione (Example 22, 5.5 g.) in THF (110 ml.) containing trimethyl orthoacetate (5.5 ml.) and p-TSA (0.33 g.) is stirred for 0.75 hours, then sulfuric acid (2 N, 5.5 ml.) is added. The mixture is allowed to stand an additional 0.5 hours at 30°, then is cooled, made basic with potassium bicarbonate (1 N, 33 ml.), diluted with water and concentrated under reduced pressure. The precipitate is collected, dissolved in ethyl acetate, washed with saline, dried and concentrated to give the title compound, TLC, Rf=0.27 (methanol-methylene chloride, 5/95).

EXAMPLE 24 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione (Example 22, 1.23 g.) triethylorthopropionate (1.2 ml.) and p-TSA hydrate (0.072 g.) in THF (24 ml.) are allowed to stand at 30° for 0.5 hour under a nitrogen atmosphere. Aqueous sulfuric acid (1 N, 1.2 ml.) is then added and the mixture allowed to stand an additional 0.5 hour at 30° C. The mixture is cooled to 5° and potassium bicarbonate (1 N, 7.2 ml.) and water (48 ml.) are added. The mixture is concentrated under reduced pressure, diluted with water and filtered. The filtrate is concentrated under reduced pressure to a gummy product which is column chromatographed on silica gel (150 g.), packed in acetone-methylene chloride (20/80). Elution is performed with the same solvent mixture. The appropriate fractions are pooled and concentrated. The concentrate is crystallized from acetone-hexane to give the title compound, m.p. 189° (decomposition); [α]_(D) +58°; IR 3480, 3420, 1730, 1695, 1225, 1180, 1165, 1085, 1065, 1035, 1010, 990, and 905 cm⁻¹.

EXAMPLES 25-27

Following the general procedure of Examples 23 and 24, and making non-critical variations but starting with the orthoesters of Column O, the 17-α-acyloxy-5β-steroids of Column P are obtained.

    ______________________________________                                         Example                                                                               Column O        Column P                                                ______________________________________                                         25     Triethyl orthobutyrate                                                                         9α-Fluoro-11β,17α,21-                                         trihydroxy-16β-methyl-                                                    5β-pregnane-3,20-dione                                                    17-butyrate                                             26     Trimethyl orthovalerate                                                                        9α-Fluoro-11β,17α,21-tri-                                     hydroxy-16β-methyl-5β-                                               pregnane-3,20-dione 17-                                                        valerate                                                27     Trimethyl orthobenzoate                                                                        9α-Fluoro-11β,17α,21-tri-                                     hydroxy-16β-methyl-5β-                                               pregnane-3,20-dione 17-                                                        benzoate                                                ______________________________________                                    

EXAMPLE 28 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-acetate 21-mesylate (I)

A solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-acetate (Example 23, 8.06 g.) in pyridine (27 ml.) is cooled to 5° and methane sulfonylchloride (6.7 ml) is slowly added. After stirring for one hour at 0°, the reaction mixture is poured into a mixture of ice and water containing concentrated hydrochloric acid (13.7 ml.). The precipitate is collected, redissolved in acetone (140 ml.) and potassium bicarbonate (1 N, 25 ml.) and allowed to stand one hour. The solution is concentrated under reduced pressure and extracted with methylene chloride. The extract is washed with saline, dried and concentrated to a foam which is column chromatographed on silica gel (300 g.). Elution is performed with acetone-methylene chloride (10/90). Appropriate fractions are pooled and concentrated under reduced pressure. The residue is crystallized from acetone-hexane to give the title compound, m.p. 154°-154.5°; NMR (CDCl₃) 0.95, 1.30, 1.35, 2.16, 3.21, 4.4 and 4.74 δ.

EXAMPLES 29-32

Following the general procedure of Example 28 and making non-critical variations but starting with the 21-hydroxy steroids of Examples 24-27 (Column Q) the 21-mesylate compounds of Column R are obtained.

    ______________________________________                                         Example                                                                               Column Q  Column R                                                      ______________________________________                                         29     24        9α-Fluoro-11β,17α,21-trihydroxy-16β                      -                                                                              methyl-5β-pregnane-3,20-dione 17-pro-                                     pionate 21-mesylate                                           30     25        9α-Fluoro-11β,17α,21-trihydroxy-16β                      -                                                                              methyl-5β-pregnane-3,20-dione 17-buty-                                    rate 21-mesylate                                              31     26        9α-Fluoro-11β,17α,21-trihydroxy-16β                      -                                                                              methyl-5β-pregnane-3,20-dione 17-valer-                                   ate 21-mesylate                                               32     27        9α-Fluoro-11β,17α,21-trihydroxy-16β                      -                                                                              methyl-5β-pregnane-3,20-dione 17-benzo-                                   ate 21-mesylate                                               ______________________________________                                    

EXAMPLE 33 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-acetate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-acetate 21-mesylate (Example 28, 3 g.) in acetone (120 ml.) and DMF (74 ml.) containing lithium chloride (6.4 g.) is heated under reflux for six days and then cooled and poured into ice water. The precipitate is collected and dried, then is crystallized from acetone to give the title compound, m.p. 210.8°-211° (decomposition).

EXAMPLE 34 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I)

Following the general procedure of Example 33 and making non-critical variations but starting with 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-mesylate (Example 29) the title compound is obtained, m.p. 190°.

EXAMPLE 35 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-butyrate (I)

Following the general procedure of Example 33 and making non-critical variations but starting with 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-butyrate 21-mesylate (Example 30), the title compound is obtained, m.p. 190°-192°.

EXAMPLE 36 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-valerate (I)

Following the general procedure of Example 33 and making non-critical variations but starting with 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-valerate 21-mesylate (Example 31) the title compound is obtained, m.p. 173°-173.8°.

EXAMPLE 37 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16-pregnane-3,20-dione 17-benzoate (I)

Following the general procedure of Example 33 and making non-critical variations but starting with 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-benzoate 21-mesylate (Example 32) the title compound is obtained.

EXAMPLE 38 17α,21-Dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17,21-dipropionate

A mixture of 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17,21-dipropionate (Preparation 9, 9.5 g.) in acetone (100 ml.) and triethylamine (16 ml.) is hydrogenated under two atmospheres of pressure in the presence of palladium on carbon (5%, 0.4 g.) for six hours. The mixture is filtered and the filtrate is condensed under reduced pressure to a foam which is column chromatographed on silica gel (300 g.) packed in acetone methylene chloride (2/98). Elution is performed with acetone-methylene chloride mixtures (2/98→5/95). The appropriate fractions are pooled and concentrated to give a product which upon crystallization from diethyl etherpentane gives the title compound, m.p. 120.5°-122°; IR (mull) 1740, 1730, 1280, 1220, 1210, 1180, 1070, 1050 and 1005 cm⁻¹ ; NMR (CDCl₃) 0.66, 1.14, 1.17, 1.19, 1.36, 4.6 and 5.6 δ.

EXAMPLES 39 and 40

Following the general procedure of Example 38 and making non-critical variations but starting with the Δ¹,4 steroids of Preparations 10 and 11 (Column S), the 5β-steroids of Column T are obtained.

    ______________________________________                                         Examples  Column S   Column T                                                  ______________________________________                                         39        10         17α,21-Dihydroxy-16α-                                              methyl-5β-pregn-9(11)-                                                    ene-3,20-dione                                                                 17,21-dipropionate                                        40        11         17α,21-Dihydroxy-5β-pregn-                                          9(11)-ene-3,20-dione                                                           17,21-dipropionate                                        ______________________________________                                    

EXAMPLE 41 9α,11β-Dichloro-17α,21-dihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

Following the general procedure of Example 50 and making non-critical variations but starting with 17α,21-dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17,21-dipropionate (I), the title compound is obtained.

EXAMPLES 42-43

Following the general procedure of Example 50 and making non-critical variations but starting with the Δ⁹(11) steroids of Examples 39-40 (Column U) the 9,11-dichloro steroids of Column V are obtained.

    ______________________________________                                         Examples   Column U    Column V                                                ______________________________________                                         42         39          9α,11β-Dichloro-17α-                                          21-dihydroxy 16α-methyl-                                                 5β-pregnane-3,20-dione                                                    17,21-dipropionate                                      43         40          9α,11β-Dichloro-17α,21-                                       dihydroxy 5β-pregnene-                                                    3,20-dione 17,21-di-                                                           propionate                                              ______________________________________                                    

EXAMPLE 44 17α,21-Dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate

A mixture of 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17-propionate 21-mesylate (Preparation 12, 7.1 g.) in acetone (100 ml.) and triethylamine (2 ml.) is hydrogenated under two atmospheres of pressure in the presence of palladium on carbon (5%, 0.5 g.). The crude product obtained from hydrogenation is column chromatographed on silica gel (350 g.), packed in acetone-methylene chloride (2/98). Elution is performed with acetone-methylene chloride mixtures (2/8→5/95). The appropriate fractions are pooled and concentrated to give the title compound, NMR (CDCl₃) 0.67, 1.14, 1.19, 1.37, 3.20, 4.72 and 5.6 δ.

EXAMPLES 45 and 46

Following the general procedure of Example 44 and making non-critical variations but starting with and substituting the Δ¹,4 -steroids of Preparations 13 and 14 (Column W) for 17α,21-dihydroxy-16β-methylpregna-1,4,9(11)-triene-3,20-dione 17-propionate 21-mesylate, the 5β-steroids of Column X are obtained.

    ______________________________________                                         Ex-  Column   Column                                                           ample                                                                               W        X                                                                ______________________________________                                         45   13       17α,21-Dihydroxy-16α-methyl-5β-pregna-9(11)                   -                                                                              ene-3,20-dione 17-propionate 21-mesylate                         46   14       17α,21-Dihydroxy-5β-pregna-9(11)-ene-3,20-                          dione 17-propionate 21-mesylate                                  ______________________________________                                    

EXAMPLE 47 21-Chloro-17α-hydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17-propionate

17α,21-Dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate (Example 44, 7.69 g.) in acetone (320 ml.) and DMF (200 ml.) are heated under reflux with lithium chloride (17.1 g.) for 90 hours. The mixture is then concentrated under reduced pressure, diluted with ice water and filtered. The filter cake is dissolved in methylene chloride, washed with saline and the methylene chloride mixture is dried and concentrated under reduced pressure to a foam which is crystallized from acetone-pentane to give the title compound, m.p. 140.5°-141.5°; IR (mull) 3040, 1745, 1735, 1710, 1645, 1355, 1205, 1195, 1175, 1040, 1015, 965 and 710 cm⁻¹ ; [α]_(D) +54°.

EXAMPLES 48 and 49

Following the general procedure of Example 47 and making non-critical variations but starting with and substituting the 5β-steroids of Examples 45 and 46 (Column Y) for 17α,21-dihydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate, the 21-chloro steroids of Column Z are obtained.

    ______________________________________                                         Ex-   Column   Column                                                          ample Y        Z                                                               ______________________________________                                         48    45       21-Chloro-17α-hydroxy-16α-methyl-5β-pregn-                    9(11)-ene-3,20-dione 17-propionate                              49    46       21-Chloro-17α-hydroxy-5β-pregn-9(11)-ene-                           3,20-dione 17-propionate                                        ______________________________________                                    

EXAMPLE 50 9α,11β,21-Trichloro-17α-hydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate (I)

A mixture of 21-chloro-17α-hydroxy-16β-methyl-5β-pregn-9(11)-ene-3,20-dione 17-propionate (Example 47, 1.3 g.) in chloroform (100 ml.) and pyridine (1 ml.) is cooled to -10°. A chlorine solution in carbon tetrachloride (40 ml., 1.15 eq.) is added at -10° and the reaction mixture is washed successively with cold aqueous potassium bisulfate, water and cold aqueous potassium bicarbonate. The layers are separated and the organic layer is concentrated under reduced pressure to a foam which is crystallized from diethyl ether-pentane and recrystallized from acetone-hexane to give the title compound, m.p. 163.8°-164°; NMR (CDCl₃) 1.01, 1.19, 1.38, 1.57, 3.98 and 4.7-4.8 δ.

EXAMPLES 51 and 52

Following the general procedure of Example 50 and making non-critical variations but starting with the Δ⁹(11) -steroids of Examples 48 and 49, (Column AA) the 21-chloro steroids of Column BB are obtained.

    ______________________________________                                         Ex.  Column   Column                                                           ample                                                                               AA       BB                                                               ______________________________________                                         51   48       9α,11β,21-Trichloro-17α-hydroxy-16α-m                   ethyl-5β-                                                                 pregnane-3,20-dione 17-propionate                                52   49       9α,11β,21-Trichloro-17α-hydroxy-5β-pre                   gnane-                                                                         3,20-dione 17-propionate                                         ______________________________________                                    

EXAMPLE 53 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I)

A mixture of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17-propionate (IA, U.S. Pat. No. 3,721,687, Example 14, 2.0 g.) in ethyl acetate is stirred with palladium on carbon (2 g.) under one atmosphere of hydrogen for 2 hours and then filtered thru diatomaceous earth. The filtrate is concentrated under reduced pressure. The concentrate is column chromatographed over silica gel (200 g.) packed in acetone-methylene chloride (5/95). Elution is performed with the same solvent mixture. The appropriate fractions (TLC) are pooled and concentrated to a solid. Upon crystallization from acetone-SSB the title compound is obtained, m.p. 191°; IR (mull) 3360, 1725, 1685, 1285, 1225, 1205, 1060, 1040, 1010, 990, 905 and 695 cm⁻¹ ; CMR 27.05 δ and [α]_(D) +63°.

EXAMPLES 54-63

Following the general procedure of Example 1 and making non-critical variations but starting with the Δ¹,4 -steroids (U.S. Pat. No. 3,731,687) of Column CC, the 5β-steroids of Column DD are obtained.

    ______________________________________                                         Ex-                                                                            ample Column CC        Column DD                                               ______________________________________                                         54    9α,21-Difluoro-11β,17α-                                                        9α,21-Difluoro-11β,17α-                      dihydroxy-16β-methylpreg-                                                                  dihydroxy-16β-methyl-5β-                            na-1,4-diene-3,20-dione                                                                         pregnane-3,20-dione                                           17-acetate       17-acetate                                              55    9α,21-Difluoro-11β,17α-                                                        9α,21-Difluoro-11β,17α-                      dihydroxy-16β-methylpreg-                                                                  dihydroxy-16β-methyl-5β-                            na-1,4-diene-3,20-dione                                                                         pregnane-3,20-dione                                           17-propionate    17-propionate                                           56    9α,21-Difluoro-11β,17α-                                                        9α,21-Difluoro-11β,17α-                      dihydroxy-16β-methylpreg-                                                                  dihydroxy-16β-methyl-5β-                            na-1,4-diene-3,20-dione                                                                         pregnane-3,20-dione                                           17-butyrate      17-butyrate                                             57    9α,21-Difluoro-11β,17α-                                                        9α,21-Difluoro-11β,17α-                      dihydroxy-16β-methylpreg-                                                                  dihydroxy-16β-methyl-5β-                            na-1,4-diene-3,20-dione                                                                         pregnane-3,20-dione                                           17-isobutyrate   17-isobutyrate                                          58    9α,21-Difluoro-11β,                                                                  9α,21-Difluoro-11β,17α-di-                   17α-dihydroxy-16β-methyl-                                                            hydroxy-16β-methyl-5β-preg-                         pregna-1,4-diene-3,20-dione                                                                     nane-3,20-dione 17-valerate                                   17-valerate                                                              59    21-Chloro-9α-fluoro-11β,                                                             21-Chloro-9α-fluoro-                                    17α-dihydroxy-16β-methyl-                                                            11β,17α-dihydroxy-                                 pregna-1,4-diene-3,20-dione                                                                     16β-methyl-5β-preg-                                 17-acetate       nane-3,20-dione 17-acetate                              60    21-Chloro-9α-fluoro-                                                                      21-Chloro-9α-fluoro-                                    11β,17α-dihydroxy-16β-                                                          11β,17α-dihydroxy-16β-                        methylpregna-1,4-diene-                                                                         methyl-5β-pregnane-3,20-                                 3,20-dione 17-butyrate                                                                          dione 17-butyrate                                       61    21-Chloro-9α-fluoro-11β,                                                             21-Chloro-9α-fluoro-11β,                           17α-dihydroxy-16β-methyl-                                                            17α-dihydroxy-16β-methyl-                          pregna-1,4-diene-3,20-                                                                          5β-pregnane-3,20-dione                                   dione 17-isobutyrate                                                                            17-isobutyrate                                          62    21-Chloro-9α-fluoro-11β,                                                             21-Chloro-9α-fluoro-11β,                           17α-dihydroxy-16β-methyl-                                                            17α-dihydroxy-16β-methyl-                          pregna-1,4-diene-3,20-                                                                          5β-pregnane-3,20-dione 17-                               dione 17-valerate                                                                               valerate                                                63    21-Chloro-9α-fluoro-11β,                                                             21-Chloro-9α-fluoro-11β,                           17α-dihydroxy-16β-methyl-                                                            17α-dihydroxy-16β-methyl-                          pregna-1,4-diene-3,20-                                                                          5β-pregnane-3,20-dione 17-                               dione 17-benzoate                                                                               benzoate                                                ______________________________________                                    

EXAMPLE 64 21-Chloro-9α-fluoro-17α-hydroxy-16β-methyl-5β-pregnane-3,11,20-trione 17-propionate (I)

Jones reagent (chromium trioxide-aqueous sulfuric acid, 1.3 ml.) is added to a solution of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-propionate (Example 53, 2 g.) in acetone (50 ml.). The mixture is stirred for 30 minutes at 20°-25°. Isopropyl alcohol (1.3 ml.) is added followed by slow addition of ice water (600 ml.). The precipitate is collected, washed with water and dried. The crude product is column chromatographed on silica gel eluting with acetone-methylene chloride (5/95). The appropriate fractions (TLC) are pooled, concentrated under reduced pressure and crystallized from acetone-SSB to give the title compound, m.p. 184°-185.5°; IR 1730, 1275, 1260, 1185, 1170, 1040 and 960 cm⁻¹ ; CMR 24.38 δ and [α]_(D) +42°.

EXAMPLE 65 21-Chloro-9α-fluoro-17α-hydroxy-16β-methyl-5β-pregnane-3,11,20-trione 17-butyrate (I)

Following the general procedure of Example 64 and making non-critical variations but starting with 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-butyrate there is obtained the title compound.

EXAMPLE 66 9α-Fluoro-11β,17α-dihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate

21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I, Example 53, 4.0 g.) in acetone (100 ml.) containing triethylamine (2 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.42 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The concentrate is column chomatographed on silica gel (200 g.) packed in acetone-methylene chloride (5/95) and eluted with the same mixture. The appropriate fractions (TLC) are pooled and concentrated to a solid. Upon crystallization from acetone-SSB the title compound is obtained, m.p. 176°-178°; [α]_(D) ²⁵ +43°; CMR (CDCl₃) 27.12 δ and IR (mull) 3481, 1722, 1702, 1294, 1227, 1205, 1067, 1058, 1043, 1004 988, and 953 cm⁻¹.

EXAMPLES 67-72

Following the general procedure of Example 66 and making non-critical variations but starting with the 21-chloro steroid of Examples 53 and 59-63 (Column EE), the compounds of Column FF are obtained.

    ______________________________________                                         Ex-   Column   Column                                                          ample EE       FF                                                              ______________________________________                                         67    53       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-propionate                               68    59       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-acetate                                  69    60       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-butyrate                                 70    61       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-isobutyrate                              71    62       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-valerate                                 72    63       9α-Fluoro-11β,17α-dihydroxy-16β-methy                    l-5β-                                                                     pregnane-3,20-dione 17-benzoate                                 ______________________________________                                    

EXAMPLE 73 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-benzoate (I)

21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17-benzoate (IA, 3.9 g.) in ethyl acetate (375 ml.) is stirred with palladium on carbon (5%, 1 g.) under one atmosphere of hydrogen until the uptake of hydrogen is complete. The mixture is then filtered and the filtrate is concentrated under reduced pressure to a solid which is column chromatographed on silica gel (400 g.) packed in methanol-methylene chloride (2/98). Elution is performed with the same methanol-methylene chloride mixture to give the product which upon crystallization from acetone-SSB gives the title compound, m.p. 174.5°-175.5° (decomposition); CMR (CDCl₃) 27.18 δ; IR (mull) 3440, 1735, 1715, 1695, 1600, 1580, 1490, 1275, 1260, 1105, 1025, 990, and 720 cm⁻¹.

EXAMPLE 74 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16β-methylpregn-4-ene-3,20-dione 17,21-dipropionate (IA, 4.75 g.) in ethyl acetate (260 ml.) is stirred with palladium on carbon (5%, 2.1 g.) under hydrogen (1 atmosphere) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure to a solid which is column chromatographed on silica gel (400 g.) packed in acetone-methylene chloride (5/95). Elution is performed with the same acetone-methylene chloride mixture. The appropriate fractions (TLC) are pooled and concentrated to a solid. Upon crystallization from acetone-SSB the title compound is obtained, m.p. 143°-144°; [α]_(D) +36°; CMR (CDCl₃) 27.0 δ and IR (mull) 3460, 1750, 1735, 1720, 1710, 1195, 1180, 1165, 1090, 1070, 1045, 1020, 990, 995 and 810 cm⁻¹.

EXAMPLE 75 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate (IA, betamethasone 17,21-dipropionate, 1.0 g.) and p-TSA hydrate (0.1 g.) in acetone (100 ml.) are shaken with palladium on carbon (5%, 0.1 g.) under hydrogen (2 atmospheres) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The residue is dissolved in methylene chloride, washed with aqueous sodium bicarbonate and dried. The mixture is concentrated and the residue is column chromatographed over silica gel (100 g.) packed in acetone-methylene chloride (10/90). Elution is performed with the same solvent mixture. The appropriate fractions are pooled and concentrated. Upon crystallization from acetone-hexane the title compound is obtained, m.p. 142°-143.5°.

EXAMPLE 76 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-mesylate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17-propionate 21-mesylate (IA, U.S. Pat. No. 3,721,687, Example 1, 5.0 g.) in acetone (100 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.5 g.) and p-TSA (0.10 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The concentrate is chromatographed on silica gel (250 g.) packed in acetone-methylene chloride (5/95). Elution is performed on the same mixture. The appropriate fractions (TLC) are pooled and concentrated to give a solid. An acetone solution of the foam is slowly added to water to give an amorphous precipitate which is collected and dried to give the title compound, m.p. 109°-115°; [α]_(D) ²⁵ +44°; CMR (CDCl₃) 27.07 δ and IR (mull) 3544, 3464, 1736, 1706, 1356, 1177, 1041, 1013, 987, 952, 926 and 812 cm⁻¹.

EXAMPLE 77 21-Bromo-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-mesylate (Example 76, 2.0 g.), lithium bromide (4 g.), acetone (80 ml.) and DMF (50 ml.) is heated under reflux for 70 hours. The reaction mixture is concentrated under reduced pressure and the concentrate is poured into ice water. A precipitate is collected, dried and then column chromatographed on silica gel (300 g.) and eluted with acetone-methylene chloride (5/95). The appropriate fractions (TLC) are pooled and concentrated to a solid. Upon crystallization from acetone-SSB the title compound is obtained, m.p. 184.5° (decomposition); [α]_(D) ²⁵ +64°; CMR (CDCl₃) 27.14 δ and IR (mull) 3353, 1725, 1689, 1284, 1244, 1206, 1088, 1062, 1014, 1012, 990 and 905 cm⁻¹.

EXAMPLE 78 21-Chloro-9α-fluoro-11β,17α-dihydroxy-6α-methyl-5.beta.-pregnane-3,20-dione 17-valerate (I)

21-Chloro-9α-fluoro-11β,17α-dihydroxy-6α-methyl-pregna-1,4-diene-3,20-dione 17-valerate (IA, 0.6 g.) in acetone (100 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.1 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate concentrated under reduced pressure. The concentrate is column chromatographed on silica gel (50 g.) packed in methylene chloride. Elution is performed with acetone-methylene chloride mixtures. The appropriate fractions are pooled and concentrated to give a solid which upon crystallization from acetone-SSB gives the title compound, m.p. 168°-169°; [α]_(D) ²⁵ -11°; CMR (CDCl₃) 27.48 δ; IR (mull) 3540, 3400, 1735, 1725, 1720, 1695, 1265, 1240, 1185, and 980 cm⁻¹.

EXAMPLE 79 9α-Fluoro-11β,17α-dihydroxy-6α-methyl-5β-pregnane-3,20-dione 17-acetate (I)

Following the general procedure of Example 78 and making non-critical variations but starting with 9α-fluoro-11β,17α-dihydroxy-6α-methylpregna-1,4-diene-3,20-dione 17-acetate the title compound is obtained.

EXAMPLE 80 21-Chloro-9α-fluoro-17α-hydroxy-6α-methyl-5β-pregnane-3,11,20-trione 17-valerate (I)

21-Chloro-9α-fluoro-17α-hydroxy-6α-methylpregna-1,4-diene-3,11,20-trione 17-valerate (IA, 1.15 g.) is hydrogenated following the general procedure of Example 78 and making non-critical variations, the title compound is obtained as an amorphous solld, m.p. 67°-72°; [α]_(D) ²⁵ -27°; CMR 24.71 δ; IR (mull) 1725, 1270, 1235, 1160, 1110, 1095, and 1030 cm⁻¹.

EXAMPLE 81 6α,9α-Difluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-diacetate (I)

Following the general procedure of Example 78 and making non-critical variations but starting with 6α,9α-difluoro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-diacetate (IA, U.S. Pat. No. 3,980,778, 7.82 g.) the title compound is obtained upon crystallization from acetone-SSB and recrystallization from acetone, m.p. 225° (decomposition); [α]_(D) ²⁵ +28°; CMR 27.24 δ; IR (mull) 3540, 1745, 1735, 1710, 1245, 1210, 1025, 1010, 1000 and 960 cm⁻¹.

EXAMPLES 82-84

Following the general procedure of Example 81 and making non-critical variations but starting with the Δ¹,4 -steroids of Column DD (U.S. Pat. No. 3,780,177) the corresponding 5β-steroids (I) of Column EE are obtained.

    ______________________________________                                         Ex-                                                                            ample                                                                               Column DD         Column EE                                               ______________________________________                                         82   6α,9α-Difluoro-11β,17α,21-                                                6α,9α-Difluoro-11β,17α,21-            trihydroxypregna-1,4-diene-                                                                      trihydroxy-5β-pregnane-                                 3,20-dione 17-butyrate                                                                           3,20-dione 17-butyrate                                       21-acetate        21-acetate                                              83   6α,9α-Difluoro-11β,17α,21-                                                6α,9α-Difluoro-11β,17α,21-            trihydroxypregna-1,4-diene-                                                                      trihydroxy-5β-pregnane-                                 3,20-dione 17-butyrate                                                                           3,20-dione 17-butyrate                                       21-propionate     21-propionate                                           84   6α,9α-Difluoro-11β,17α,21-                                                6α,9α-Difluoro-11β,17α,21             trihydroxypregna-1,4-diene-                                                                      trihydroxy-5β-pregnane-                                 3,20-dione 17,21-dibuty-                                                                         3.20-dione 17,21-dibuty-                                     rate              rate                                                    ______________________________________                                    

EXAMPLE 85 6α,9α-Difluoro-17α,21-dihydroxy-16β-methyl-5β-pregnane-3,11,20-trione 17,21-diacetate (I)

Following the general procedure of Example 64 and making non-critical variations and starting with 6α,9α-difluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-diacetate (Example 81, 5 g.) the title compound is obtained, upon crystallization from acetone-SSB, m.p. 251.5°; [α]_(D) ²⁵ +1°; CMR (CDCl₃) 24.68 δ; IR (mull) 1755, 1735, 1715, 1240, 1205, 1070, 1045, and 1015 cm⁻¹.

EXAMPLES 86-88

Following the general procedure of Example 85 and making non-critical variations but starting with the steroids of Examples 82-84, (Column GG) the 11-keto steroids of Column HH are obtained.

    ______________________________________                                         Ex-                                                                            ample Column GG  Column HH                                                     ______________________________________                                         86    82         6α,9α-Difluoro-17α,21-dihydroxy-5β                      -preg-                                                                         nane-3,11,20 trione 17-butyrate 21-acetate                    87    83         6α,9α-Difluoro-17α,21-dihydroxy-5β                      -preg-                                                                         nane-3,11,20 trione 17-butyrate 21-propio-                                     nate                                                          88    84         6α,9α-Difluoro-17α,21-dihydroxy-5β                      -preg-                                                                         nane-3,11,20 trione 17,21-dibutyrate                          ______________________________________                                    

EXAMPLE 89 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-valerate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17-valerate (IA, betamethasone 17-valerate, 3.0 g.) and triethylamine (1.5 ml.) in acetone (100 ml.) are shaken with palladium on carbon (5%, 0.3 g.) under hydrogen (2 atmospheres) until the uptake of hydrogen is complete. The mixture is filtered and the filtrated concentrated under reduced pressure. The residue is column chromatographed on silica gel (300 g.) packed in acetone-methylene chloride (10-90). Elution is performed with the same solvent mixture. The appropriate fractions are pooled and concentrated. Upon crystallizing the residue from ether-pentane the title compound is obtained, m.p. 135°-136°; IR 3480, 3440, 1725, 1710, 1295, 1260, 1180, 1090, 1065, 1040, 1015, 985 and 950 cm⁻¹.

EXAMPLES 90-103

Following the general procedure of Example 89 and making non-critical variations but starting with the α¹,4 -steroids of Column II, the 5β-steroids of Column JJ are obtained.

    ______________________________________                                         Ex-                                                                            am-                                                                            ple  Column II         Column JJ                                               ______________________________________                                         90   9α-Fluoro-11β,17α,21 -tri-                                                      9α-Fluoro-11β,17α,21-tri-                   hydroxy-16β-methylpregna-                                                                   hydroxy-16β-methyl-5β-pre-                         1,4-diene-3,20-dione 17-                                                                         gnane-3,20-dione 17-ace-                                     acetate           tate                                                    91   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxy-16β-methylpregna-                                                                   hydroxy-16β-methyl -5β-                            1,4-diene-3,20-dione                                                                             pregnane-3,20-dione 17-                                      17-propionate     propionate                                              92   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α21-tri-                    hydroxy-16β-methylpregna-                                                                   hydroxy-16β-methy-5β-                              1,4-diene-3,20-dione 17-                                                                         pregnane-3,20-dione 17-                                      butyrate          butyrate                                                93   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxy-16β -methypregna-                                                                   hydroxy-16β-methyl-5β-                             1,4-diene-3,20-dione                                                                             pregnane-3,20-dione 17-                                      17-benzoate       benzoate                                                94   9α-Fluoro-11β ,17α,21-tri-                                                      9α-Fluoro-11β, ,17α,21-tri-                 hydroxy-16α-methylpregna-                                                                  hydroxy-16α-methyl-5β-                            1,4-diene-3,20-dione-17                                                                          pregnane-3,20-dione 17-                                      acetate           acetate                                                 95   9α-Fluoro-11β,17α, 21-tri-                                                      9α-Fluoro-11β,17α,21-tri-                   hydroxy-16α-methylpregna-                                                                  hydroxy-16α-methyl-5β-                            1,4-diene-3,20-dione 17-                                                                         pregnane-3,20-dione 17-                                      propionate        propionate                                              96   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxy-16α-methylpregna-                                                                  hydroxy-16α-methyl-5β-                            1,4-diene-3,20-dione 17-                                                                         pregnane-3,20-dione 17-                                      butyrate          butyrate                                                97   9α-Fluoro-11β ,17α,21-tri-                                                      9α-Fluoro-11β,17α,21-tri-                   hydroxy-16α-methylpregna-                                                                  hydroxy-16α-methyl-5β-                            1,4-diene-3,20-dione 17-                                                                         pregnane-2,20-dione 17-                                      valerate          valerate                                                98   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxy-16α-methylpregna-                                                                  hydroxy-16α-methyl-5β-                            1,4-diene-3,20-dione 17-                                                                         pregnane-3,20-dione 17-                                      benzoate          benzoate                                                99   9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxypregna-1,4-diene                                                                          hydroxy-5β-pregnane-3,20-                               3,20-dione 17-acetate                                                                            dione 17-acetate                                        100  9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxypregna-1,4-diene-                                                                         hydroxy-5β-pregnane-3,20-                               3,20-dione 17-propionate                                                                         dione 17-propionate                                     101  9α-Fluoro-11β,17α,21-tri-                                                       9αFluoro-11β,17α,21-tri-                    hydroxypregna-1,4-diene-                                                                         hydroxy-5β-pregnane-3,20-                               3,20-dione 17-butyrate                                                                           dione 17-butyrate                                       102  9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxypregna-1,4-diene-                                                                         hydroxy-5β-pregnane-3,20-                               3,20-dione 17-valerate                                                                           dione 17-valerate                                       103  9α-Fluoro-11β,17α,21-tri-                                                       9α-Fluoro-11β,17α,21-tri-                   hydroxypregna-1,4-diene                                                                          hydroxy-5β-pregnane-3,20-                               3,20-dione 17-benzoate                                                                           dione 17-benzoate                                       ______________________________________                                    

EXAMPLE 104 9α-Fluoro-11β,17α,21-trihydroxy-16α-methyl-562 -pregnane-3,20-dione 17-propionate 21-mesylate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione 17-propionate 21-mesylate (IA, dexamethasone 17-propionate 21-mesylate, U.S. Pat. No. 3,721,687, Example 5, 3.6 g.), triethylamine (1.5 ml.) and acetone (100 ml.) are shaken with palladium on carbon (5%, 0.3 g.) under hydrogen (2 atmospheres) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate concentrated under reduced pressure. The residue is column chromatographed on silica gel (200 g.), packed in methanol-methylene chloride (2/98). Elution is performed in the same solvent mixture. The appropriate fractions are pooled and concentrated to give the title compound; NMR (CDCl₃) 0.90, 1.0, 1.16, 1.29, 3.2, 4.4, 4.84 δ.

EXAMPLE 105 21-Bromo-9α-fluoro-11β,17α-dihydroxy-16α-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16α-methyl-5β-pregnane-3,20-dione 17-propionate 21-mesylate (Example 104, 3.6 g.) and lithium bromide (fused, 7.2 g.) in acetone (144 ml.) and DMF (90 ml.) are heated under reflux for 10 days. The mixture is then concentrated under reduced pressure, diluted with water and filtered to obtain the precipitate. The solid is chromatographed on silica gel (360 g.) packed in acetone-methylene chloride (5/95) and eluted with the same solvent mixture. The appropriate fractions are pooled and concentrated. The concentrate is rechromatographed on silica gel using acetone-methylene chloride (2/98) as the eluant. The appropriate fractions are pooled and concentrated. Upon crystallization from acetone the title compound is obtained, m.p. 178°-178.5° (decomposition); [α]_(D) +22°.

EXAMPLE 106 9α-Fluoro-11β,17α-dihydroxy-16α-methyl-5α-pregnane-3,20-dione 17-propionate (I)

21-Bromo-9α-fluoro-11β,17α-dihydroxy-16α-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I, Example 105, 1.6 g.) in acetone (100 ml.) containing triethylamine (1 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.1 g.) and worked up in the usual manner. Crystallization of the chromatographed product from acetone gives the title compound, m.p. 144.5°-147.5° (decomposition); [α]_(D) +12°.

EXAMPLE 107 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16α-methyl-5.beta.-pregnane-3,20-dione 17-propionate (I)

21-Chloro-9α-fluoro-11β,17α-dihydroxy-16α-methylpregna-1,4-diene-3,20-dione 17-propionate (IA, U.S. Pat. No. 3,721,687, Example 20, 1.67 g.) in acetone (100 ml.) is hydrogenated in the presence of p-TSA hydrate (0.18 g.) and palladium on carbon (5%, 0.18 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The crude product is dissolved in acetone and precipitated by the addition of water to give a solid which is obtained by filtration. Crystallization of the solid from acetone gives the title compound, m.p. 198° (decomposition); CMR 27.1 δ; [α]_(D) +14°; IR 3360, 1715, 1680, 1290, 1240, 1200, 1085, 1045, 1020, 1010 and 905 cm⁻¹.

EXAMPLES 108-111

Following the general procedure of Example 107 and making non-critical variations but starting with the Δ¹,4 -steroids of Column KK, the 5β-steroids of Column LL are obtained.

    ______________________________________                                         Example                                                                               Column KK        Column LL                                              ______________________________________                                         108    21-Chloro-9α-fluoro-                                                                      21-Chloro-9α-fluoro-                                    11β,17α-dihydroxy-16α-                                                         11β,17α-dihydroxy-16α-                       methylpregna-1,4-diene-                                                                         methyl-5β-pregnane-3,20-                                 3,20-dione 17-acetate                                                                           dione 17-acetate                                       109    21-Chloro-9α-fluoro-                                                                      21-Chloro-9α-fluoro-                                    11β,17α-dihydroxy-16α-                                                         11β,17α-dihydroxy-16α-                       methylpregna-1,4-diene-                                                                         methyl-5β-pregnane-3,20-                                 3,20-dione 17-butyrate                                                                          dione 17-butyrate                                      110    21-Chloro-9α-fluoro-                                                                      21-Chloro-9α-fluoro-                                    11β,17α-dihydroxy-16α-                                                         11β,17α-dihydroxy-16α-                       methylpregna-1,4-diene-                                                                         methyl-5β-pregnane-3,20-                                 3,20-dione 17-valerate                                                                          dione 17-valerate                                      111    21-Chloro-9α-fluoro-                                                                      21-Chloro-9α-fluoro-                                    11β,17α-dihydroxy-16α-                                                         11β,17α-dihydroxy-16-                              methylpregna-1,4-diene-                                                                         methyl-5β-pregnane-3,20-                                 3,20-dione 17-benzoate                                                                          dione 17-benzoate                                      ______________________________________                                    

EXAMPLE 112 9α-Fluoro-11β,17α-dihydroxy-16α-methyl-5β-pregnane-3,20-dione 17-propionate (I)

Following the general procedure of Example 106 and making non-critical variations but starting with 21-chloro-9α-fluoro-11β,17α-dihydroxy-16α-methyl-5.beta.-pregnane-3,20-dione 17-propionate (Example 107) the title compound is obtained.

EXAMPLE 113 9α-Fluoro-11β,17α,21-trihydroxy-16α-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

9α-Fluoro-11β,17α,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate (IA, 2.66 g.) in acetone (100 ml.) is hydrogenated in the presence of p-TSA hydrate (0.1 g.) and palladium on carbon (5%, 0.1 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate concentrated under reduced pressure. The crude product is column chromatographed on silica gel (100 g.) and eluted with acetone-methylene chloride (5/95). The appropriate fractions are pooled and concentrated to a solid. Crystallization of the solid from acetone-hexane gives the title compound, m.p. 176°; CMR 27.01 δ; IR 3540, 1750, 1730, 1710, 1275, 1220, 1185, 1170, 1090, 1055, 1040, 1025, 1005 and 990 cm⁻¹.

EXAMPLE 114 9α-Fluoro-11β,17α,21-trihydroxy-5β-pregnane-3,20-dione 17,21-dipropionate (I)

9α-Fluoro-11β,17α,21-trihydroxypregna-1,4-diene-3,20-dione 17,21-dipropionate in acetone (100 ml.) containing triethylamine (2 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.1 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The residue is column chromatographed on silica gel (125 g.) packed in acetone-methylene chloride (5:95) and eluted with the same mixture. The appropriate fractions (TLC) are pooled and concentrated to a solid which is crystallized from acetone-pentane. The crystalline product is pulverized and dried at 80° under high vacuum to afford the title compound, m.p. 153.2°-154°; [α]_(D) +4°; CMR 27.0 δ; IR 3540, 1750, 1735, 1705, 1285, 1230, 1205, 1185, 1160, 1095, 1075, 1010 and 905 cm⁻¹.

EXAMPLE 115 9α-Chloro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

A mixture of beclomethasone dipropionate (9α-chloro-11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate, 3.0 g.) in ethyl acetate (200 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.3 g.) and pTSA (0.1 g.) for 2.5 hours and is then filtered. The filtrate is washed with cold aqueous potassium bicarbonate and saline and dried and evaporated under reduced pressure. The residue is column chromatographed on silica gel (300 g.) packed in acetone-methylene chloride (5/95). Elution is performed with the same solvent mixture. Appropriate fractions are pooled and concentrated to give the title compound.

EXAMPLE 116 9α,21-Dichloro-11β,17α-dihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate (I)

A mixture of 9α,21-dichloro-11β,17α-dihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17-propionate (U.S. Pat. No. 3,721,687, 1.5 g.) in acetone (100 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.2 g.) for about 1 hour. The crude product is column chromatographed on silica gel (150 g.) packed in acetone-methylene chloride (5/95). Elution with acetone-methylene chloride mixture and crystallization of appropriate fractions from acetone-pentane gives the title compounds, m.p. 148.5°-149°; [α]_(D) +55°.

EXAMPLE 117 9α-Chloro-21-fluoro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-propionate (I)

Following the general procedure of Example 116 and making non-critical variations but starting with 9α-chloro-21-fluoro-11β,17α-dihydroxypregna-1,4-diene-3,20-dione 17-propionate (German Offen No. 2,742,982), the title compound is obtained.

EXAMPLES 118 and 119

Following the general procedure of Example 116 and making non-critical variations but starting with the Δ⁴ -steroids of Column MM, the 5β-steroids of Column NN are obtained.

    ______________________________________                                         Ex-                                                                            am-                                                                            ple  Column MM        Column NN                                                ______________________________________                                         118  9α,21-Dichloro-11β,17α-                                                        9α,21-Dichloro-11β,17α-di-                   dihydroxypregn-4-ene-                                                                           hydroxy-5β-pregnane-3,20-                                3,20-dione 17-propionate                                                                        dione 17-propionate                                      119  9α-Chloro-21-fluoro-                                                                      9α-Chloro-21-fluoro-11β,17α-                 11β,17α-dihydroxypregna-                                                             dihydroxy-5β-pregnane-3,20-                              4-ene-3,20-dione 17-                                                                            dione 17-propionate                                           propionate                                                                ______________________________________                                    

EXAMPLE 120 11β,17α,21-Trihydroxy-16α-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

A mixture of 11β,17α,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate (IA, 2.0 g.) in acetone (200 ml.) and triethylamine (2 ml.) is hydrogenated in the presence of palladium on carbon (5%, 0.1 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate concentrated under reduced pressure to a foam which is chromatographed on silica gel (150 g. ), packed in acetone-methylene chloride (5/95). Elution is performed with the same acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated to give the title compound which is crystallized from diethylether-pentane, m.p. 142°-142.9°; NMR (CDCl₃) 4.82, 4.4, 1.25, 1.16, 1.06, and 0.95 δ.

EXAMPLE 121 11β,17α,21-Trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate (I)

Following the general procedure of Example 120 and making non-critical variations but starting with 11β,17α,21-trihydroxy-16β-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate, the title compound is obtained.

EXAMPLE 122 7α-Chloro-11β,17α,21-trihydroxy-16α-methyl-5β-pregnane-3,20-dione 17,21-dipropionate

Following the general procedure of Example 53 and making non-critical variations but starting with 7α-chloro-11β,17α,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione 17,21-dipropionate (U.S. Pat. No. 4,124,707) the title compound is obtained.

EXAMPLE 123 21-Chloro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-propionate (I)

Following the general procedure of Example 53 and making non-critical variations but starting with 21chloro-11β,17α-dihydroxypregn-4-ene-3,20-dione (Japan, Kokai No. 77 83,446), the title compound is obtained.

EXAMPLE 124 21-Chloro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-butyrate (I)

Following the general procedure of Example 53 and making non-critical variations but starting with 21-chloro-11β,17α-dihydroxypregna-4-ene-3,20-dione 17-butyrate (Japan, Kokai No. 77 83,446), the title compound is obtained.

EXAMPLE 125 21-Chloro-9,11-epoxy-17α-hydroxy-5β-pregnane-3,20-dione 17-propionate (II)

Following the general procedure of Example 53 and making non-critical variations but starting with 21-chloro-9,11-epoxy-17α-hydroxypregn-4-ene-3,20-dione 17-propionate, the title compound is obtained.

EXAMPLES 126-128

Following the general procedure of Example 125 and making non-critical variations but starting with the Δ4-steroids of Column OO, the 5β-steroids of Column PP are obtained.

    ______________________________________                                         Ex-                                                                            am-                                                                            ple  Column 00        Column PP                                                ______________________________________                                         126  21-Chloro-9,11-epoxy-                                                                           21-Chloro-9,11-epoxy-17α-                               17α-hydroxy-16β-methyl-                                                              hydroxy-16β-methyl-5β-                              pregn-4-ene-3,20-dione                                                                          pregnane-3,20-dione 17-                                       17-propionate    propionate                                               127  21-Chloro-9,11-epoxy-                                                                           21-Chloro-9,11-epoxy-17α-                               17α-hydroxy-16α-methyl-                                                             hydroxy-16α-methyl-5β-                             pregn-4-ene-3,20-dione                                                                          pregnane-3,20-dione 17-                                       17-propionate    propionate                                               128  9,11-Epoxy-17α,21-dihydr-                                                                 9,11-Epoxy-17α,21-dihydroxy-                            oxy-16β-methylpregn-4-                                                                     16β-methyl-5β-pregnane-3,20-                        ene-3,20-dione 17,21-dipro-                                                                     dione 17,21-dipropionate                                      pionate                                                                   ______________________________________                                    

EXAMPLE 129 9α,21-Dichloro-11β,17α-dihydroxy-5β-pregnane-3,20-dione 17-propionate (I)

To a solution of 21-chloro-9,11-epoxy-17α-hydroxy-5β-pregnane-3,20-dione 17-propionate (Example 125, 4.9 g.) in alcohol-free chloroform (250 ml.) containing tetrabutylammonium chloride (10 g. containing 15% n-butyl alcohol) is added slowly a chloroform solution of acetyl chloride (1.1 equivalents). The mixture is allowed to stand for 1 hr. at 20°-25° and is then concentrated under reduced pressure. The residue is column chromatographed on silica gel (500 g.) packed in acetone-methylene chloride. Elution with an acetone-methylene chloride mixture and pooling of the appropriate fractions gives the title compound.

EXAMPLE 130 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-valerate 21-dihydrogen phosphate (I)

A solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane 3,20-dione 17-valerate (Example 89, 1 g.) in THF (50 ml.) is added to a stirred solution of pyrophosphoryl chloride (0.65 ml.) in THF (10 ml.) at -50°. The temperature is allowed to rise slowly to -10° where it is held for five hours and then is allowed to stand at -4° for 18 hours. The mixture is diluted with water and concentrated under reduced pressure. The precipitate is collected and dissolved in ethyl acetate. The solution is washed with saline, dried and concentrated to give the title compound.

EXAMPLE 131 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-benzoate 21-dihydrogen phosphate (I)

Phosphorus oxychloride (8 g.) is added to a solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-benzoate (Example 93, 4 g.) in THF. The solution is cooled to -10°, pyridine (0.65 ml.) is added slowly, and the mixture is allowed to warm slowly to 20°-25° and stand for about 6 hours. The mixture is then diluted with ice water and concentrated under reduced pressure. the precipitate is collected, washed with water and suspended in aqueous methanol and sodium hydroxide (0.1 N) is added until the pH is 9.0. The aqueous solution is extracted with ethyl acetate, then acidified with dilute hydrochloric acid. The precipitate is collected, washed with water and dissolved in ethyl acetate. The ethyl acetate solution is washed with saline, dried and concentrated to give the title compound.

EXAMPLES 132-144

Following the general procedure of Examples 130 and 131, and making non-critical variations but starting with the 21-hydroxy steroids of Examples 90-103 (Column QQ), the 21-dihydrogen phosphate esters of Column RR are obtained.

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  QQ     Column RR                                                          ______________________________________                                         132  90     9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-                                                                            5β-pregnane-3,20-dione 17-acetate 21-dihydro-                             gen phosphate                                                      133  91     9α-Fluoro-11,17α,21-trihydroxy-16β-methyl-5-                  pregnane-3,20-dione 17-propionate 21-dihydro-                                  gen phosphate                                                      134  92     9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-                                                                            5β-pregnane-3,20-dione 17-butyrate 21-dihydro-                            gen phosphate                                                      135  94     9αFluoro-11β,17α,21-trihydroxy-16α-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-acetate 21-dihydrogen                                   phosphate                                                          136  95     9α-Fluoro-18β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-propionate 21-dihydro-                                  gen phosphate                                                      137  96     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-butyrate 21-dihydrogen                                  phosphate                                                          138  97     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-valerate 21-dihydrogen                                  phosphate                                                          139  98     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-benzoate 21-dihydrogen                                  phosphate                                                          140  99     9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-acetate 21-dihydrogen phosphate                        141  100    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-propionate 21-dihydrogen phosphate                     142  101    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-butyrate 21-dihydrogen phosphate                       143  102    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-valerate 21-dihydrogen phosphate                       144  103    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-benzoate 21-dihydrogen phosphate                       ______________________________________                                    

EXAMPLE 145 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-disodium phosphate (I)

A finely ground sample of 9α-fluoro-11β,17α,21-trihydroxy-16β-methy-5β-pregnane-3,20-dione 17-propionate 21-dihydrogen phosphate (Example 133, 5 g.) is suspended in water (50 ml.) and stirred while sodium hydroxide (1 N) is added until the pH is 9. The solution is filtered and freeze dried to give the title compound.

EXAMPLES 146-159

Following the general procedure of Example 145, and making non-critical variations but starting with the 21-dihydrogen phosphate esters of Examples 130-144 (Column SS), there are obtained the corresponding 21-disodium phosphate ester salts of Column TT.

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  SS     Column TT                                                          ______________________________________                                         146  132    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-acetate 21-disodium                                     phosphate                                                          147  134    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-butyrate 21-disodium                                    phosphate                                                          148  130    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-valerate 21-disodium                                    phosphate                                                          149  131    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20 -dione 17-benzoate 21-disodium                                   phosphate                                                          150  135    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-acetate 21-disodium                                     phosphate                                                          151  136    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-propionate 21-disodium                                  phosphate                                                          152  137    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-butyrate 21-disodium                                    phosphate                                                          153  138    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-valerate 21-disodium                                    phosphate                                                          154  139    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-benzoate 21-disodium                                    phosphate                                                          155  140    9α-Fluoro-11β, 17α,21-trihydroxy-5β-preg                 nane-3,                                                                        20-dione 17-acetate 21-disodium phosphate                          156  141    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-propionate 21-disodium phosphate                       157  142    9α-Fluor0-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-butyrate 21-disodium phosphate                         158  143    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane,3,                                                                         20-dione 17-valerate 21-disodium phosphate                         159  144    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione-17-benzoate 21-disodium phosphate                         ______________________________________                                    

EXAMPLE 160 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-hemisuccinate (I)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate (Example 91, 5.4 g.) and succinic anhydride (5.6 g.) in pyridine (46 ml.) is stirred overnight at 20°-25°. The reaction mixture is then poured slowly into a stirred mixture of ice water (1 l.) containing hydrochloric acid (46 ml.). The precipitate is collected, washed thoroughly with water and dried to give the title compound.

EXAMPLES 161-174

Following the general procedure of Example 160, and making non-critical variations but starting with the 21-hydroxy steroids of Examples 89-103 (Column UU), the 21-hemisuccinate esters of Column VV

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  UU     Column VV                                                          ______________________________________                                         161  90     9α-fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-acetate 21-hemisuccin-                                  ate                                                                162  92     9α-fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20dione 17-butyrate 21-hemisuccin-                                  ate                                                                163  89     9α-fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20-dione 17-valerate 21-hemisuccin-                                 ate                                                                164  93     9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5β-                                                                    pregnane-3,20 -dione 17-benzoate 21-hemisuccin-                                ate                                                                165  94     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-acetate 21-hemisuccin-                                  ate                                                                166  95     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-propionate 21-hemisuc-                                  cinate                                                             167  96     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-butyrate 21-hemisuccin-                                 ate                                                                168  97     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-valerate 21-hemisuccin-                                 ate                                                                169  98     9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5β-                                                                   pregnane-3,20-dione 17-benzoate 21-hemisuccin-                                 ate                                                                170  99     9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-acetate 21-hemisuccinate                               171  100    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-propionate 21-hemisuccinate                            172  101    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-butyrate 21-hemisuccinate                              173  102    9α-Fluoro-11β,17α,21-trihydorxy-5β-pregn                 ane-3,                                                                         20-dione 17-valerate 21-hemisuccinate                              174  103    9α-Fluoro-11β,17α,21-trihydroxy-5β-pregn                 ane-3,                                                                         20-dione 17-benzoate 21-hemisuccinate                              ______________________________________                                    

EXAMPLE 175 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-disodiumhemisuccinate (I)

A solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate 21-hemisuccinate (Example 160, 1.63 g.) in acetone (10 ml.) is diluted with water (10 ml.) and a solution of sodium bicarbonate (0.248 g., 1.0 equivalent) in water (13.5 ml.) is added. The mixture is concentrated under reduced pressure and freeze-dried to give the title compound.

EXAMPLES 176-189

Following the general procedure of Example 175 and making non-critical variations but starting with the 21-hemisuccinate esters of Examples 161-174 (Column WW), the 21-sodium hemisuccinate ester salts of Column XX are obtained.

    ______________________________________                                         Exam- Column                                                                   ple   WW       Column XX                                                       ______________________________________                                         176   161      9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl-5β-pregnane-3,20-dione 17-acetate                                  21-sodium hemisuccinate                                         177   162      9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl-5β-pregnane-3,20-dione 17-butyrate                                 21-sodium hemisuccinate                                         178   163      9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl -5β-pregnane-3,20-dione 17-valerate                                21-sodium hemisuccinate                                         179   164      9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl-5β-pregnane-3,20-dione 17-benzoate                                 21-sodium hemisuccinate                                         180   165      9α-Fluoro-11β,17α,21-trihydroxy-16α-                    methyl-5β-pregnane-3,20-dione 17-acetate                                  21-sodium hemisuccinate                                         181   166      9α-Fluoro-11β, 17α, 21-trihydroxy-16.alpha                    .-                                                                             methyl-5β-pregnane-3,20-dione 17-propion-                                 ate 21-sodium hemisuccinate                                     182   167      9α -Fluoro-11β,17α,21-trihydroxy-16α                    -                                                                              methyl-5β-pregnane-3,20-dione 17-butyrate                                 21-sodium hemisuccinate                                         183   168      9α-Fluoro-1β,17α,21-trihydroxy-16α-                     methyl-5β-pregnane-3,20-dione 17-valerate                                 21-sodium hemisuccinate                                         184   169      9α-Fluoro-11β,17α,21-trihydroxy-16α-                    methyl-5β-pregnane-3,20-dione 17-benzoate                                 21-sodium hemisuccinate                                         185   170      9α-Fluoro-11β,17α-21-trihydroxy-5β-pr                    eg-                                                                            nane-3,20-dione 17-acetate 21-sodium hemi-                                     succinate                                                       186   171      9α-Fluoro-11β,17α,21-trihydroxy-5β-pr                    eg-                                                                            nane-3,20-dione 17-propionate 21-sodium                                        hemisuccinate                                                   187   172      9α-Fluoro-11β,17α,21-trihydroxy-5β-pr                    eg-                                                                            nane-3,20-dione 17-butyrate 21-sodium                                          hemisuccinate                                                   188   173      9α-Fluoro-11β,17α,21-trihydroxy-5β-pr                    eg-                                                                            nane-3,20-dione 17-valerate 21-sodium                                          hemisuccinate                                                   189   174      9α-Fluoro-1β,17α,21-trihydroxy-5β-pre                    gn-                                                                            ane-3,20-dione 17-benzoate 21-sodium hemi-                                     succiante                                                       ______________________________________                                    

EXAMPLE 190 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate (IVE)

A mixture of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione (Preparation 18, 2.2 g.) in THF (45 ml.) containing triethylorthopropionate (2.2 ml.) and p-TSA (0.14 g.) is stirred for 0.5 hrs., then sulfuric acid (2 N, 2.2 ml.) is added. The mixture is allowed to stand an additional half hour at 30°, then is cooled, made basic with potassium bicarbonate (1 N, 15 ml.), diluted with water and concentrated under reduced pressure. The precipitate is collected, dissolved in ethyl acetate, washed with saline, dried and concentrated to give the title compound.

EXAMPLES 191-204

Following the general procedure of Preparations 15-18 and Example 190, but starting with 17α,21-dihydroxy-16β-methylpregna-4,9(11)-diene-3,20-dione 21-acetate (U.S. Pat. No. 3,072,685), 17α,21-dihydroxy-16α-methylpregna-4,9(11)-diene-3,20-dione 21-acetate and 17α,21-dihydroxypregna-4,9(11)diene-3,20-dione 21-acetate and using for the esterifying agents trimethylorthoacetate, triethylorthopropionate, triethylorthobutyrate, trimethylorthovalerate, and trimethylorthobenzoate, according to the procedure of Example 190 the 5α-steroids of Column YY are obtained.

    ______________________________________                                         Ex-                                                                            am-                                                                            ple  Column YY                                                                 ______________________________________                                         191  17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-          dione 17-acetate                                                          192  17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-          dione 17-butyrate                                                         193  17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-          dione 17-valerate                                                         194  17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-          dione 17-benzoate                                                         195  17α,21-Dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20          -                                                                              dione 17-acetate                                                          196  17α,21-Dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20          -                                                                              dione 17-propionate                                                       197  17α,21-Dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20          -                                                                              dione 17-butyrate                                                         198  17α,21-Dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20          -                                                                              dione 17-valerate                                                         199  17α,21-Dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20          -                                                                              dione 17-benzoate                                                         200  17α,21-Dihydroxy-5α-pregn-9(11)-ene-3,20-dione                     17-acetate                                                                201  17α,21-Dihydroxy-5α-pregn-9(11)-ene-3,20-dione                     17-propio-                                                                     nate                                                                      202  17α,21-Dihydroxy-5α-pregn-9(11)-ene-3,20-dione 17-buty-            rate                                                                      203  17α,21-Dihydroxy-5α-pregn-9(11)-ene-3,20-dione                     17-valer-                                                                      ate                                                                       204  17α,21-Dihydroxy-5α-pregn-9(11)-ene-3,20-dione                     17-benzo-                                                                      ate                                                                       ______________________________________                                    

EXAMPLE 205 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate

A mixture of 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate (Example 190, 4.1 g.) in pyridine (20 ml.) is cooled to 0° and methanesulfonylchloride (5 ml.) is added slowly. After stirring for 1 hour at 0°, the reaction mixture is poured into a mixture of ice and water containing hydrochloric acid (15 ml.). The precipitate is collected, dissolved in methylene chloride and washed successively with aqueous potassium bisulfate, water and aqueous potassium bicarbonate. The extract is concentrated to a foam which is chromatographed on silica gel (500 g.) and eluted with acetone-methylene chloride mixtures. Appropriate fractions are pooled and concentrated to give the title compound.

EXAMPLE 206 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione 17-propionate (IV)

Step 1 9α-Bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate

A mixture of 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate (Example 205, 12.9 g.) in t-butyl alcohol (5 ml.) and methylene chloride (40 ml.) is mixed with a solution of perchloric acid (70%, 36 ml.) in water (490 ml.) and then a solution of N-bromoacetamide (6.6 g.) in t-butyl alcohol (70 ml.) is added at 20°-25°. The mixture is stirred for 0.5 hours at 20°-25°, then is diluted with a solution of sodium sulfite (6.6 g.) in water (70 ml.), concentrated under reduced pressure to remove the methylene chloride, then further diluted with water (1 l.) and concentrated. The precipitate is collected and dried to give 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate.

Step 2 9,11-Epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate

A solution of 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate (Step 1, 2.9 g.) in THF (200 ml.) is cooled to 5° and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 1 ml.) is added. The mixture was allowed to warm to 20°-25° and stand for several hours at 20°-25°. The reaction mixture is then diluted with water (380 ml.) and concentrated under reduced pressure to give a precipitate which is dissolved in methylene chloride. The solution is washed with aqueous potassium bisulfate, water and aqueous potassium bicarbonate and dried and concentrated to give a solid which is chromatographed on silica gel. Elution is performed with acetone-methylene chloride mixtures and the appropriate fractions are pooled and concentrated under reduced pressure. The product is crystallized from acetone-ether to give 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate, m.p. 140°-142°; NMR (CDCl₃) 0.89, 1.18, 1.20, 1.34, 3.17, 3.45 and 4.68δ.

Step 3 21-Chloro-9,11-epoxy-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate

A mixture of 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-mesylate (Step 2, 4 g.) and lithium chloride (8 g.) in DMF (100 ml.) and acetone (100 ml.) is heated under reflux for about 100 hours. The reaction mixture is concentrated under reduced pressure and diluted with water. The precipitate is collected, dried and chromatographed on silica gel (200 g.). The column is eluted with acetone-methylene chloride; the appropriate fractions are pooled and concentrated to give 21-chloro-9,11-epoxy-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate.

Step 4 21-Chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione 17-propionate (IV)

Following the general procedure of (Examples 290-298, Step 3) and making non-critical variations but starting with 21-chloro-9,11-epoxy-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate (Step 3), the title compound is obtained, m.p. 195°; NMR (CDCl₃) 0.95, 1.18, 1.35, 4.0, 4.25δ; IR (mull) 3500, 1720, 1295, 1245, 1020, 1005, 995 and 895 cm⁻¹.

EXAMPLES 207-220

Following the general procedure of Example 205 and 206 and making non-critical variations but starting with the Δ⁹,(11) -21-hydroxy-steroids of Example 191-204 (Column ZZ) the 21-Chloro steroids of Column AAA are obtained.

    ______________________________________                                         Exam- Column                                                                   ple   ZZ       Column AAA                                                      ______________________________________                                         207   191      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.b                    eta.-                                                                          methyl-5α-pregnane-3,20-dione 17-acetate                  208   192      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.b                    eta.-                                                                          methyl-5α-pregnane-3,20-dione 17-butyrate                 209   193      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.b                    eta.-                                                                          methyl-5α-pregnane-3,20-dione 17-valerate                 210   194      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.a                    lpha.-                                                                         methyl-5α-pregnane-3,20-dione 17-benzoate                 211   195      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.a                    lpha.- -  methyl-5α-pregnane-3,20-dione 17-acetate        212   196      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.a                    lpha.-                                                                         methyl-5α-pregnane-3,20-dione 17-propion-                                ate                                                             213   197      21-Chloro-9α-Fluoro-11β,17α-dihydroxy-16.a                    lpha.-                                                                         methyl-5α-pregnane-3,20-dione 17-butyrate                 214   198      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.a                    lpha.-                                                                         methyl-5α-pregnane-3,20-dione 17-valerate                 215   199      21-Chloro-9α-fluoro-11β,17α-dihydroxy-16.a                    lpha.-                                                                         methyl-5α-pregnane-3,20-dione 17-benzoate                 216   200      21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.al                    pha.-                                                                          pregnane-3,20-dione 17-acetate                                  217   201      21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.al                    pha.-                                                                          pregnane-3,20-dione 17-propionate                               218   202      21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.al                    pha.-                                                                          pregnane-3,20-dione 17-butyrate                                 219   203      21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.al                    pha.-                                                                          pregnane-3,20-dione 17-valerate                                 220   204      21-Chloro-9α-fluoro-11β,17α-dihydroxy-5.al                    pha.-                                                                          pregnane-3,20-dione 17-benzoate                                 ______________________________________                                    

EXAMPLE 221 9α-Fluoro-11β,17α-dihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate (IV)

A sample of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione 17-propionate (Example 206, 8 g.) in acetone (200 ml.) containing triethylamine (4 ml.) is hydrogenated at 2 atmospheres in the presence of palladium on carbon (5%, 0.8 g.) until the uptake of hydrogen is complete. The mixture is filtered and the filtrate is concentrated under reduced pressure. The residue is chromatographed on silica gel (400 g.) and eluted with acetone-methylene chloride mixtures. The appropriate fractions are pooled and concentrated under reduced pressure to give the title compound.

EXAMPLES 222-235

Following the general procedure of Example 221 and making non-critical variations but starting with the 17-acetate, 17-butyrate, 17-valerate or 17-benzoate esters of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione (Examples 207-210), there are obtained the corresponding 21-unsubstituted esters, namely the 17-acetate, 17-butyrate, 17-valerate, or 17-benzoate esters of 9α-fluoro-11β,17α-dihydroxy-16β-methyl-5α-pregnane-3,20-dione are obtained.

Following the procedure of Example 221 and making non-critical variations but starting with the 17-acetate, 17-propionate, 17-butyrate, 17-valerate or 17-benzoate esters of 21-chloro-9αfluoro-11β,17α-dihydroxy-16α-methyl-5.alpha.-pregnane-3,20-dione and 21-chloro-9α-fluoro-11β,17α-dihydroxy-5α-pregnane-3,20-dione (Examples 211-220), the corresponding 21-unsubstituted esters, namely the 17-acetate, 17-propionate, 17-butyrate, 17-valerate or 17-benzoate esters of 9α-fluoro-11β,17α-dihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-fluoro-11β,17α-dihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLE 236 21-Chloro-9α-fluoro-17α-hydroxy-16β-methyl-5α-pregnane-3,11,20-trione 17-propionate (IV)

Jones reagent (chromium trioxide-aqueous sulfuric acid, 2.6 ml.) is added to a solution of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione 17-propionate (Example 206, 4 g.) in acetone (100 ml.). The mixture is stirred for one-half hour at 20°-25°. Isopropyl alcohol is added followed by slow addition of ice water (600 ml.). The mixture is concentrated under reduced pressure and filtered. The crude product is dried and chromatographed on silica gel (400 g.), eluting with an acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated under reduced pressure to give the title compound.

EXAMPLES 237-250

Following the procedure of Example 236 and making non-critical variations but starting with the 17-acetate, 17-butyrate, 17-valerate or 17-benzoate esters (Examples 207-210) of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16β-methyl-5.alpha.-pregnane-3,20-dione the corresponding trione esters, namely the 17-acetate, 17-butyrate, 17-valerate and 17-benzoate esters, of 21-chloro-9α-fluoro-17α-hydroxy-16β-methyl-5α-pregnane-3,11,20-trione are obtained.

Following the general procedure of Example 236 and making non-critical variations but starting with the 17-acetate, 17-propionate, 17-butyrate, 17-valerate or 17-benzoate esters of 21-chloro-9α-fluoro-11β,17α-dihydroxy-16α-methyl-5.alpha.-pregnane-3,20-dione and 21-chloro-9α-fluoro-11β,17α-dihydroxy-5α-pregnane-3,20-dione (Examples 211-220), the corresponding trione esters, namely the 17-acetate, 17-propionate, 17-butyrate, 17-valerate or 17-benzoate esters of 21-chloro-9α-fluoro-17α-hydroxy-16α-methyl-5α-pregnane-3,11,20-trione and 21-chloro-9α-fluoro-17α-hydroxy-5α-pregnane-3,11,20-trione are obtained.

EXAMPLE 251 9α,11β,21-Trichloro-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate (IV)

Step 1 21-Chloro-17α-hydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate

Following the general procedure of Example 206, Step 3, and making non-critical variations but starting with 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-mesylate, (Example 205) 21-chloro-17α-hydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate is obtained.

Step 2 9α,11β,21-Trichloro-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate

A mixture of 21-chloro-17α-hydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate (Step 1, 1.3 g.) in chloroform (100 ml.) and and pyridine (1 ml.) is cooled to -10°. The chlorine solution in carbon tetrachloride (40 ml., 1.15 equivalents) is added at -10° and the reaction mixture is washed successively with cold aqueous potassium bisulfate, water and cold aqueous potassium bicarbonate. The organic extract is dried and concentrated and the residue is chromtographed on silica gel. The column is eluted with an acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated under reduced pressure to give the title compound.

EXAMPLES 252-265

Following the general procedure of Examples 205 and 251, and making non-critical variations but starting with the 17-acetate, 17-butyrate, 17-vatetrachloride (40 ml., 1.15 equivalents) is added at -10° and the reaction mixture is washed successively with cold aqueous potassium bisulfate, water and cold aqueous potassium bicarbonate. The organic extract is dried and concentrated and the residue is chromatographed on silica gel. The column is eluted with an acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated under reduced pressure to give the title compound.

EXAMPLES 252.265

Following the general procedure of Examples 205 and 251, and making non-critical variations but starting with the 17-acetate, 17-butyrate, 17-valerate and 17-benzoate esters of 17α,21-dihydroxy-16β-methylpregn-9(11)-ene-3,20-dione (Examples 191-194), the corresponding trichlorinated steroids, namely the 17-acetate, 17-butyrate, 17-valerate and 17-benzoate of 9α,11β,21-trichloro-17α-hydroxy-16β-methyl-5α-pregnane-3,20-dione are obtained.

Following the general procedure of Examples 205 and 251 and making non-critical variations but starting with the 17-acetate, 17-propionate, 17-butyrate, 17-valerate and 17-benzoate esters of 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione and 17α,21-dihydroxy-5αpregn-9(11)-ene-3,20-dione (Examples 195-204) the corresponding trichlorinated steroids, namely the 17-acetate, 17-propionate, 17-butyrate, 17-valerate and 17-benzoate esters of 9α,11β,21-trichloro-17α-hydroxy-16α-methyl-5α-pregna-3,20-dione and 9α,11β,21-trichloro-17α-hydroxy-5α-pregna-3,20-dione are obtained.

EXAMPLES 266-280

Following the general procedure of Example 383 and making non-critical variations but starting with the 17-acetate 21-mesylate, 17-propionate 21-mesylate, 17-butyrate 21-mesylate, 17-valerate 21-mesylate or 17-benzoate 21-mesylate diesters of 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9α-bromo-11β,17β,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dioneand 9α-bromo-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione, (Examples 206-220, Step 1) the corresponding 9-unsubstituted diesters, namely the 17-acetate 21-mesylate, 17-propionate 21-mesylate, 17-butyrate 21-mesylate, 17-valerate 21-mesylate or 17-benzoate 21-mesylate diesters of 11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione, 11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLE 281 17α,21-Dihydroxy-16β-methyl-5α-pregn-9(11)ene-3,20-dione 17,21-dipropionate

A solution of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate (Example 190, 2 g.) in pyridine (8 ml.) and propionic anhydride (4 ml.) was allowed to stand overnight at 20°-25°. The mixture is then diluted with ice and water to give a precipitate which was collected and dried. The crude produce is chromatographed on silica gel (200 g.) and eluted with acetone-methylene chloride mixtures. The appropriate fractions are pooled and concentrated to give the title compound.

EXAMPLE 282

Following the general procedure of Example 281 and making non-critical variations but using acetic anhydride in place of propionic anhydride the corresponding 21-ester, namely 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-acetate is obtained.

EXAMPLES 283 and 284

Following the general procedure of Examples 281 and 282 and making non-critical variations but starting with 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate (Example 196), the corresponding 17,21-diesters, namely 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-acetate and 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione 17,21-dipropionate are obtained.

EXAMPLE 285 and 286

Following the general procedure of Examples 281 and 282 and making non-critical variations but starting with 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione 17-propionate (Example 201), the corresponding 21-esters, namely the 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione 17-propionate 21-acetate and 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione 17,21-dipropionate are obtained.

EXAMPLES 287-289

Following the general procedure of Example 282 and making non-critical variations but starting with the 17-butyrate esters of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione, 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione or 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione (Examples 192, 197 and 202) the corresponding 17,21-diesters, namely the 17-butyrate 21-acetate diesters of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione, 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione, or 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione are obtained.

EXAMPLES 290-298

Step 1

Following the general procedure of Example 206, Step 1, and making non-critical variations but starting with the 17-propionate 21-acetate, 17,21-dipropionate, or 17-butyrate 21-acetate diesters of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione, 17α, 21-dihydroxy-16α-methyl-5α-pregn-9(11)-ene-3,20-dione and 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione (Examples 281-289) the corresponding bromohydrins, namely the 17-propionate 21-acetate, 17,21-dipropionate, or 17-butyrate 21-acetate diesters of 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9α-bromo-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-bromo-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

Step 2

Following the general procedure of Example 206, Step 2, and making non-critical variations but starting with the 17-propionate 21-acetate, 17,21-dipropionate, or 17-butyrate 21-acetate diesters of 9α-bromo-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione, 9α-bromo-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-bromo-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione (Step 1), the corresponding 9,11-epoxides, namely the 17-propionate 21-aceatate, 17,21-dipropionate or 17-butyrate 21-acetate diesters of 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9,11-epoxy-17α,21-dihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9,11-epoxy-17α,21-dihydroxy-5α-pregnane-3,20-dione are obtained.

Step 3 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17,21-dipropionate (IV)

A sample of 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione 17,21-dipropionate (Step 2) is added to a stirred mixture of hydrogen fluoride (9.2 g.), methylene chloride (6.6 ml.) and water (3.57 ml.) at -70°. The mixture is stirred for one hour at -70° and then one hour at -30°, then cooled to -70° and diluted with cold THF (14 ml.). The reaction mixture is then poured into a cold stirred mixture of potassium carbonate, water and THF. The aqueous phase is separated, diluted with water and extracted with methylene chloride. The organic extracts are combined, washed with water, dried and concentrated under reduced pressure. The residue is chromatographed on silica gel (200 g.), eluted with an acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated under reduced pressure. Crystallization of the residue from hexane-ether gives the title compound, m.p. 147.5°-147.6°; NMR (CDCl₃) 0.94, 1.16, 1.18. 1.36. 4.28, 4.57; CMR 14.51 δ ; IR (mull) 3360, 1750, 1735, 1700, 1360, 1334, 1070, 1020, 1185, 1175, 965, 940 and 880 cm⁻¹.

Following the general procedure of Step 3 above and making non-critical variations but starting with the 17-propionate 21-acetate or 17-butyrate 21-acetate diesters of 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione (Step 2), the corresponding fluorohydrins, namely the 17-propionate 21-acetate and 17-butyrate 21-acetate diesters of 9α-fluoro-11,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione are obtained.

Following the procedure of Step 3 above and making non-critical variations but starting with the 17-propionate 21-acetate, 17,21-dipropionate or 17-butyrate 21-acetate diesters of 9,11-epoxy-17α,21-dihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9,11-epoxy-17α,21-dihydroxy-5α-pregnane-3,20-dione (Step 2) the corresponding fluorohydrins, namely the 17-propionate 21-acetate, 17,21-dipropionate, or 17-butyrate 21-acetate diesters of 9α-fluoro-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-fluoro-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLE 299 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate (IV)

Step 1 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17,21-dipropionate (Example 290, 2.1 g.) in methanol (70 ml.) and aqueous potassium carbonate (10%, 15 ml.) is stirred for about 1 hour under a nitrogen atmosphere. The mixture is then acidified with acetic acid, diluted with water and concentrated under reduced pressure. The mixture is cooled and the solid is collected, washed with water and dried to give 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione.

Step 2 9αFluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione (Step 1, 1.1 g.) in THF (25 ml.) containing triethylorthopropionate (1.2 ml.) and p-TSA (1.07 g.) is allowed to stand at 30° for about 1 hour and then sulfuric acid (2 N, 1.2 ml.) is added. The mixture is stirred for an additional half hour, then made basic with potassium carbonate (1 N, 7 ml.) diluted with water and concentrated under reduced pressure. The precipitate is collected, dissolved in ethyl acetate, washed with saline, dried and concentrated to give the title compound.

EXAMPLES 300-313

Step 1

Following the general procedure of Example 299, Step 1, and making non-critical variations but starting with the 17,21-dipropionate, 17-propionate 21-acetate, and 17-butyrate 21-acetate diesters of 9α-fluoro-11β,17α,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9α-fluoro-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-fluoro-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione (Examples 290-298), the corresponding triols, namely 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9α-fluoro-11β,17α,21-trihydroxy-16α-5α-pregnane-3,20-dione and 9α-fluoro-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

Step 2

Following the general procedure of Example 299, Step 2, and making non-critical variations but substituting trimethylorthoacetate, triethylorthobutyrate, trimethylorthovalerate, or trimethylorthobenzoate for trimethylorthopropionate, the corresponding 17-esters, namely the 17-acetate, 17-butyrate, 17-valerate and 17-benzoate esters of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione are obtained.

Following the general procedure of Example 299, Step 2, and making non-critical variations but starting with 9α-fluoro-11β,17α,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-fluoro-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione, the corresponding 17α-esters, namely the 17-acetate, 17-propionate, 17-butyrate, 17-valerate or 17-benzoate esters of 9α-fluoro-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,2-dione and 9α-fluoro-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLE 314 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-valerate 21-dihydrogen phosphate (IV)

A solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-prepane 3,20-dione 16-valerate (Example 302, 1 g.) in THF (50 ml.) is added to a stirred solution of pyrophosphoryl chloride (0.65 ml.) in THF (10 ml.) at -50°. The temperature is allowed to rise slowly to -10° where it is held for five hours and then is allowed to stand at -4° for 18 hours. The mixture is diluted with water and concentrated under reduced pressure. The precipitate is collected and dissolved in ethyl acetate. The solution is washed with saline, dried and concentrated to give the title compound.

EXAMPLE 315 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-benzoate 21-dihydrogen phosphate (IV)

Phosphorus oxychloride (8 g.) is added to a solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5β-pregnane-3,20-dione 17-benzoate (Example 303, 4 g.) in THF. The solution is cooled to -10°, pyridine (0.65 ml.) is added slowly, and the mixture is allowed to warm slowly to 20°-25° and stand for about 6 hours. The mixture is then diluted with ice water and concentrated under reduced pressure. The precipitate is collected, washed with water and suspended in aqueous methanol and sodium hydroxide (0.1 N) is added until the pH is 9.0. The aqueous solution is extracted wth ethyl acetate, then acidified with dilute hydrochloric acid. The precipitate is collected, washed with water and dissolved in ethyl acetate. The ethyl acetate solution is washed with saline, dried and concentrated to give the title compound.

EXAMPLES 316-328

Following the general procedure of Examples 314 and 315, and making non-critical variations but starting with the 21-hydroxy steriods of Examples 299-313 (Column BBB), the 21-dihydrogen phosphate esters of Column CCC are obtained.

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  BBB    Column CCC                                                         ______________________________________                                         316  300    9α-Fluoro-11β,17α,21 trihydroxy-16β-meth                 yl-                                                                            5α-pregnane-3,20-dione 17 acetate 21-dihydro-                            gen phosphate                                                      317  299    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-propionate 21-dihydro-                                  gen phosphate                                                      318  301    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-                                                                            5α-pregnane-3,20-dione 17-butyrate 21-dihydro-                           gen phosphate                                                      319  304    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-acetate 21-dihydrogen                                   phosphate                                                          320  305    9α-Fluoro-11β,21-trihydroxy-16α-methyl-5.alph                 a.-                                                                            pregnane-3,20-dione 17-propionate 21-dihydro-                                  gen phosphate                                                      321  306    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-butyrate 21-dihydrogen                                  phosphate                                                          322  307    9α-Fluoro-11-62 ,17α,21-trihydroxy-16α-methy                 l-5α-                                                                    pregnane-3,20-dione 17-valerate 21-dihydrogen                                  phosphate                                                          323  308    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-benzoate 21-dihydrogen                                  phosphate                                                          324  309    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-acetate 21-dihydrogen phosphate                        325  310    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-propionate 21-dihydrogen phosphate                     326  311    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-butyrate 21-dihydrogen phosphate                       327  312    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-valerate 21-dihydrogen phosphate                       328  313    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-benzoate 21-dihydrogen phosphate                       ______________________________________                                    

EXAMPLE 329 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione17-propionate 21-disodium phosphate (IV)

A finely ground sample of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-dihydrogen phosphate (Example 316, 5 g.) is suspended in water (50 ml.) and stirred while sodium hydroxide (1 N) is added until the pH is 9. The solution is filtered and freeze dried to give the title compound.

EXAMPLES 330-343

Following the general procedure of Example 329, and making non-critical variations but starting with the 21-dihydrogen phosphate esters of Examples 314-328 (Column DDD), there are obtained the corresponding 21-disodium phosphate ester salts of Column EEE.

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  DDD     Column EEE                                                        ______________________________________                                         330  317     9α-Fluoro-11β,17α,21-trihydroxy-16β-met                  hyl-5α-                                                                  pregnane-3,20-dione 17-acetate 21-disodium                                     phosphate                                                         331  318     9α-Fluoro-11β,17α,21-trihydroxy-16β-met                  hyl-5α-                                                                  pregnane-3,20-dione 17-butyrate 21-disodium                                    phosphate                                                         332  314     9α-Fluoro-11β,17α,21-trihydroxy-16β-met                  hyl-5α-                                                                  pregnane-3,20-dione 17-valerate 21-disodium                                    phosphate                                                         333  315     9α-Fluoro-11β,17α,21-trihydroxy-16β-met                  hyl-5α-                                                                  pregnane-3,20-dione 17-benzoate 21-disodium                                    phosphate                                                         334  319     9α-Fluoro-11β,17α,21-trihydroxy-16α-me                  thyl-5α-                                                                 pregnane-3,20-dione 17-acetate 21-disodium                                     phosphate                                                         335  320     9α-Fluoro-11β,17α,21-trihydroxy-16α-me                  thyl-5α-                                                                 pregnane-3,20-dione 17-propionate 21-disodium                                  phosphate                                                         336  321     9α-Fluoro-11β,17α,21-trihydroxy-16α-me                  thyl-5α-                                                                 pregnane-3,20-dione 17-butyrate 21-disodium                                    phosphate                                                         337  322     9α-Fluoro-11β,17α,21-trihydroxy-16α-me                  thyl-5α-                                                                 pregnane-3,20-dione 17-valerate 21-disodium                                    phosphate                                                         338  323     9α-Fluoro-11β,17α,21-trihydroxy-16α-me                  thyl-5α-                                                                 pregnane-3,20-dione 17-benzoate 21-disodium                                    phosphate                                                         339  324     9α-Fluoro-11β,17α,21-trihydroxy-5α-pre                  gnane-3,                                                                       20-dione 17-acetate 21-disodium phosphate                         340  325     9α-Fluoro-11β,17α,21-trihydroxy-5α-pre                  gnane-3,                                                                       20-dione 17-propionate 21-disodium phosphate                      341  326     9α-Fluoro-11β,17α,21-trihydroxy-5α-pre                  gnane-3,                                                                       20-dione 17-butyrate 21-disodium phosphate                        342  327     9α-Fluoro-11β,17α,21-trihydroxy-5α-pre                  gnane-3,                                                                       20-dione 17-valerate 21-disodium phosphate                        343  328     9α-Fluoro-11β,17α,21-trihydroxy-5α-pre                  gnane-3,                                                                       20-dione-17-benzoate 21-disodium phosphate                        ______________________________________                                    

EXAMPLE 344 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-hemisuccinate (IV)

A mixture of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate (Example 229, 5.4 g.) and succinic anhydride (5.6 g.) in pyridine (46 ml.) is stirred overnight at 20°-25°. The reaction mixture is then poured slowly into a stirred mixture of ice water (1 l.) containing hydrochloric acid (46 ml.). The precipitate is collected, washed thoroughly with water and dried to give the title compound.

EXAMPLES 345-358

Following the general procedure of Example 344, and making non-critical variations but starting with the 21-hydroxy steroids of Examples 299-313 (Column FFF), the 21-hemisuccinate esters of Column GGG are obtained.

    ______________________________________                                         Ex-  Col-                                                                      am-  umn                                                                       ple  FFF    Column GGG                                                         ______________________________________                                         345  300    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-acetate 21-hemisuccin-                                  ate                                                                346  301    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-butyrate 21-hemisuccin-                                 ate                                                                347  302    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-valerate 21-hemisuccin-                                 ate                                                                348  303    9α-Fluoro-11β,17α,21-trihydroxy-16β-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-benzoate 21-hemisuccin-                                 ate                                                                349  304    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-acetate 21-hemisuccin-                                  ate                                                                350  305    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-propionate 21-hemisuc-                                  cinate                                                             351  306    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-butyrate 21-hemisuccin-                                 ate                                                                352  307    9α-Fluoro-11β,17α,21-trihydroxy-16α-met                 hyl-5α-                                                                  pregnane-3,20-dione 17-valerate 21-hemisuccin-                                 ate                                                                353  308    9α-Fluoro-11β,17α,21-trhydroxy-16α-meth                 yl-5α-                                                                   pregnane-3,20-dione 17-benzoate 17-benzoate                                    21-hemisuccinate                                                   354  309    9α-Fluoro-11β-17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-acetate 21-hemisuccinate                               355  310    9αFluoro-11β,17α,21-trihydroxy-5α-pregn                 ane-3,                                                                         20-dione 17-propionate 21-hemisuccinate                            356  311    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-butyrate 21-hemisuccinate                              357  312    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-valerate 21-hemisuccinate                              358  313    9α-Fluoro-11β,17α,21-trihydroxy-5α-preg                 nane-3,                                                                        20-dione 17-benzoate 21-hemisuccinate                              ______________________________________                                    

EXAMPLE 359 9α-Fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-sodium hemisuccinate (IV)

A solution of 9α-fluoro-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17-propionate 21-hemisuccinate (Example 344, 1.63 g.) in acetone (10 ml.) is diluted with water (10 ml.) and a solution of sodium bicarbonate (0.248 g., 1.0 equivalent) in water (13.5 ml.) is added. The mixture is concentrated under reduced pressure and freeze-dried to give the title compound.

EXAMPLES 360-373

Following the general procedure of Example 359 and making non-critical variations but starting with the 21-hemisuccinate esters of Examples 345-358 (Column HHH), the 21-sodium hemisuccinate ester salts of Column III are obtained.

    ______________________________________                                         Exam- Column                                                                   ple   HHH     Column III                                                       ______________________________________                                         360   345     9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl-5α-pregnane-3,20-dione 17-acetate                                 21-sodium hemisuccinate                                          361   346     9α-Fluoro-11β, 17α,21-trihydroxy-16β-                    N                                                                              methyl-5α-pregnane-3,20-dione 17-butyrate                                21-sodium hemisuccinate                                          362   347     9αFluoro-11β,17α,21-trihydroxy-16β-                      methyl-5α-pregnane-3,20-dione 17-valerate                                21-sodium hemisuccinate                                          363   348     9α-Fluoro-11β,17α,21-trihydroxy-16β-                     methyl-5α-pregnane-3,20-dione 17-benzoate                                21-sodium hemisuccinate                                          364   349     9α-Fluoro-11β,17α,21-trihydroxy-16α-                    O                                                                              methyl-5α-pregnane-3,20-dione 17-acetate                                 21-sodium hemisuccinate                                          365   350     9α-Fluoro-11β,17α,21-trihydroxy-16α-                    T                                                                              methyl-5α-pregnane-3,20-dione 17-propion-                                ate 21-sodium hemisuccinate                                      366   351     9α-Fluoro-11β,17α,21-trihydroxy-16α-                    methyl-5α-pregnane-3,20-dione 17-butyrate                  21-sodium hemisuccinate                                                        367   352     9α-Fluoro-11β,17α,21-trihydroxy-16α-                    methyl-5α-pregnane-3,20-dione 17-valerate                                21-sodium hemisuccinate                                          368   353     9α-Fluoro-11β,17α,21-trihydroxy-16α-                    methyl-5α-pregnane-3,20-dione 17-benzoate                                21-sodium hemisuccinate                                          369   354     9α-Fluoro-11β,17α,21-trihydroxy-5α-pr                   eg-                                                                            nane-3,20-dione 17-acetate 21-hemi-                                            succinate                                                        370   355     9α-Fluoro-11β,17α,21-trihydroxy-5α-pr                   eg-                                                                            nane-3,20-dione 17-propionate 21-sodium                                        hemisuccinate                                                    371   356     9αFluoro-11β,17α,21-trihydroxy-5α-pre                   g-                                                                             nane-3,20-dione 17-butyrate 21-sodium                                          hemisuccinate                                                    372   357     9α-Fluoro-11β,17α,21-trihydroxy-5α-pr                   eg-                                                                            nane-3,20-dione 17-valerate 21-sodium                                          hemisuccinate                                                    373   358     9α-Fluoro-11β,17α,21-trihydroxy-5α-pr                   egn-                                                                           ane-3,20-dione 17-benzoate 21-sodium hemi-                                     succinate                                                        ______________________________________                                    

EXAMPLES 374-382

Following the general procedure of Example 251, Step 2, and making non-critical variations but starting with the 17-propionate 21-acetate, 17,21-dipropionate, or 17-butyrate 21-acetate diesters of 17α,21-dihydroxy-16β-methyl-5α-pregn-9(11)-ene-3,20-dione, 17α,21-dihydroxy-16α-methyl-5α-pregn-9(11)ene-3,20-dione and 17α,21-dihydroxy-5α-pregn-9(11)-ene-3,20-dione (Examples 281-289), the corresponding 9,11-dichloro diesters, namely the 17-propionate 21-acetate, 17,21-dipropionate or 17-butyrate 21-acetate diesters of 9α,11β-dichloro-17α,21-dihydroxy-16β-methyl-5α-pregnane-3,20-dione, 9α,11β-dichloro-17α,21-dihydroxy-16α-methyl-5.alpha.-pregnane-3,20-dione and 9α,11β-dichloro-17α,21-dihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLE 383 11β,17α,21-Trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17,21-dipropionate (IV)

A solution of 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione 17,21-dipropionate (Example 291, Step 1, 15.6 g.) in DMF (90 ml.) containing mercaptoacetic acid (12 ml.) is stirred at 20°-25° during the addition of aqueous chromous sulfate (35 ml.). The chromous sulfate is prepared from chromic sulfate hydrate (26.9 g.) and zinc (70 g., 30 mesh), stirred in water (66 ml.) for 16 hours under nitrogen. The steroid reaction mixture is stirred for several hours and then is diluted with water (400 ml.) and filtered. The crude product is dried and chromatographed on silica gel (670 g.), eluting with an acetone-methylene chloride mixture. The appropriate fractions are pooled and concentrated under reduced pressure to give the title compound.

EXAMPLES 384 and 385

Following the general procedure of Example 383 and making non-critical variations but starting with the 17-propionate 21-acetate or 17-butyrate 21-acetate diesters of 9α-bromo-11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione (Examples 290 and 292, Step 2), the corresponding 9-unsubstituted diesters, namely the 17-propionate 21-acetate or 17-butyrate 21-acetate diesters of 11β,17α,21-trihydroxy-16β-methyl-5α-pregnane-3,20-dione are obtained.

EXAMPLES 386-391

Following the general procedure of Example 383 and making non-critical variations but starting with the 17-propionate 21-acetate, 17,21-dipropionate or 17-butyrate 21-acetate diesters of 9α-bromo-11β,17α,21-trihydroxy-16α-methyl-5α-pregnane-3,20-dione and 9α-bromo-11β,17α,21-trihydroxy-5α-pregnane-3,20-dione (Examples 293-298, Step 1) the corresponding 9-unsubstituted diesters, namely the 17-propionate 21-acetate, 17,21-dipropionate or 17-butyrate 21-acetate diesters of 11β,17α21-trihydroxy-16α-methyl-5α-pregnane-3,20-dioneand 11β,17α,21-trihydroxy-5α-pregnane-3,20-dione are obtained.

EXAMPLES 392-406

Following the general procedure of Example 206, Step 3 and making non-critical variations but starting with the 21-mesylate of Examples 266-280 (Column JJJ) the 21-chloro steroids of Column KKK are obtained.

    ______________________________________                                         Example                                                                               Column JJJ Column KKK                                                   ______________________________________                                         392    266        21-Chloro-11β,17α-dihydroxy-16β-                               methyl-5α-pregnane-3,20-dione 17-                                        propionate                                                   393    267        21-Chloro-11β,17α-dihydroxy-16β-                               methyl-5α-pregnane-3,20-dione 17-                                        acetate                                                      394    268        21-Chloro-11β,17α-dihydroxy-16β-                               methyl-5α-pregnane-3,20-dione 17-                                        butyrate                                                     395    269        21-Chloro-1β,17α-dihydroxy-16β-                                methyl-5α-pregnane-3,20-dione 17-                                        valerate                                                     396    270        21-Chloro-11β,17α-dihydroxy-16β-                               methyl-5α-pregnane-3,20-dione 17-                                        benzoate                                                     397    271        21-Chloro-11β,17α-dihydroxy-16α-                              methyl-5α-pregnane-3,20-dione 17-                                        acetate                                                      398    272        21-Chloro-11β,17α-dihydroxy-16α-                              methyl-5α-pregnane-3,20-dione 17-                                        propionate                                                   399    273        21-Chloro-11β,17α-dihydroxy-16α-                              methyl-5α-pregnane-3,20-dione 17-                                        butyrate                                                     400    274        21-Chloro-11β,17α-dihydroxy-16α-                              methyl-5α-pregnane-3,20-dione 17-                                        valerate                                                     401    275        21-Chloro-11β,17α-dihydroxy-16α-                              methyl-5α-pregnane-3,20-dione 17-                                        benzoate                                                     402    276        21-Chloro-11β,17α-dihydroxy-5α-preg-                          nane-3,20-dione 17-acetate                                   403    277        21-Chloro-11β,17α-dihydroxy-5α-preg-                          nane-3,20-dione 17-propionate                                404    278        21-Chloro-11β,17α-dihydroxy-5α-preg-                          nane-3,20-dione 17-butyrate                                  405    279        21-Chloro-11β,17α-dihydroxy-5α-preg-                          nane-3,20-dione 17-valerate                                  406    280        21-Chloro-11β,17α-dihydroxy-5α-preg-                          nane-3,20-dione 17-benzoate                                  ______________________________________                                          ##STR1## 

We claim:
 1. A 5β-9,11-epoxy steroid of the formula:where R₂, R₆, R₇, R₁₆α, R₁₆β, R₁₇,
 2. A compound according to claim 1 which is 21-chloro-9,11-epoxy-17α-hydroxy-5β-pregnane-3,20-dione
 3. A compound according to claim 1 which is 21-chloro-9,11-epoxy-17α-hydroxy-16β-methyl-5β-pregnane-3,
 4. A compound according to claim 1 which is 21-chloro-9,11-epoxy-17α-hydroxy-16α-methyl-5β-pregnane-3
 5. A compound according to claim 1 which is 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5β-pregnane-3,20-di
 6. A process for preparing a 5β-9,11-epoxy steroid of the formula: ##STR2## which comprises (1) hydrogenating a compound of the formula: ##STR3## in the presence of a hydrogenating catalyst and (2) separating the 5β-isomer from the 5α-isomer where R₂, R₆, R₇, R₁₆α, R₁₆β, R₁₇, R₂₁, ˜, and are defined in the specification.
 7. The process according to claim 6 where the hydrogenating catalyst is selected from the group consisting of palladium on carbon, platinum on carbon, platinum dioxide, palladium on barium carbonate or palladium on calcium carbonate.
 8. A process according to claim 6 where R₂ and R₇ are hydrogen atoms.
 9. A process according to claim 6 where R₆ is a hydrogen or fluorine atom or methyl group.
 10. A process according to claim 9 where R₆ is a hydrogen atom.
 11. A process according to claim 6 where R₁₆α is a hydrogen atom or methyl group.
 12. A process according to claim 6 where R₁₆β is a hydrogen atom or methyl group.
 13. A process according to claim 6 where R₁₇ is alkyl of 1 thru 5 carbon atoms, phenyl, or paramethylphenyl.
 14. A process according to claim 13 where R₁₇ is alkyl of 1 thru 4 carbon atoms or phenyl.
 15. A process according to claim 6 where R₂₁ is a hydrogen, fluorine, or chlorine atom or a --OR_(21a) group where R_(21a) is defined in the specification.
 16. A process according to claim 15 where R₂₁ is a hydrogen or chlorine atom or --OR_(21a) group where R_(21a) is --COR_(21b) where R_(21b) is defined in the specification.
 17. A process according to claim 6 where the 5β-9,11-epoxy steroid (II) is 21-chloro-9,11-epoxy-17α-hydroxy-5β-pregnane-3,20-dione 17-propionate.
 18. A process according to claim 6 where the 5β-9,11-epoxy steroid (II) is 21-chloro-9,11-epoxy-17α-hydroxy-16β-methyl-5β-pregnane-3,20-dione 17-propionate.
 19. A process according to claim 6 where the 5β-9,11-epoxy steroid (II) is 21-chloro-9,11-epoxy-17α-hydroxy-16α-methyl-5β-pregnane-3,20-dione 17-propionate.
 20. A process according to claim 6 where the 5β-9,11-epoxy steroid (II) is 9,11-epoxy-17α,21-dihydroxy-16β-methyl-5β-pregnane-3,20-dione 17,21-dipropionate. 